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75 Cards in this Set
- Front
- Back
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Listening to your favorite radio station involves which area of physics? |
Vibrations and wave phenomena |
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A baker makes a loaf of bread. Identify the area of physics that involves this. |
thermodynamics |
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A hiker uses a compass to navigate through the woods. Which area of physics is this? |
Electromagnetism |
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The symbols for units of length in order from smallest to largest are... |
mm, cm, m, and km |
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If some measurements agree closely with each other but differ widely from the actual value, these measurements are... |
Precises but not accurate |
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5 darts strike near the center of a target. The dart thrower is... |
both precise and accurate |
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The creek letter Delta (triangle) indicates a(n)... |
Difference or change |
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The Greek letter sigma (E-looking) indicates a(n)... |
Sum or total |
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What are the basic SI units? |
Meters, kilograms, seconds |
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What is the speed of an object at rest? |
0.0 m/s |
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A dolphin swims 1.85 km/hr. How far has the dolphin traveled after 0.60hr? |
1.1 km |
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Acceleration is... |
the rate of change of velocity |
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When velocity is positive and acceleration is negative, what happens to the object's motion? |
The object slows down |
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A shopping cart given an initial velocity of 2.0m/s undergoes a constant acceleration of 3.0m/s2. What is the magnitude of the cart's displacement after the first 4.0s of its motion? |
32 m |
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A marble accelerates from rest at a constant rate and trails for a total displacement of 44m in 20.0s. What is the average velocity of the marble? |
2.2 m/s |
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Which of the following is a value for the acceleration of objects in free-fall? |
-9.81 m/s2 |
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Acceleration due to gravity is also called... |
free-fall acceleration |
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Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt? |
They would hit the ground at the same time. |
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Which of the following is a physical quantity that has both magnitude and direction? |
Vector |
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Identify the following qualities as a scalar or a vector: The speed of a snail, the time it takes to run mile, the free-fall acceleration. |
Scalar, scalar, vector |
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Which is the following is an example of a vector quantity? |
Velocity |
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Multiplying or dividing vectors by scalars results in... |
Vectors |
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Which of the following is the best coordinate system to analyze an object thrown into the air? |
x-axis: parallel to the ground; y-axis: perpendicular to the ground |
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Which of the following is the motion of objects moving in two dimensions under the influence of gravity? |
projectile motion |
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What is the path of a projectile? |
A parabola |
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A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to... |
move west at a speed that is equal to the bus's speed |
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A piece of chalk is dropped by a teacher walking at a speed of 1.5m/s. From the teacher's perspective, the chalk appears to fall... |
straight down and backward |
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Which of the following is the cause of an acceleration or a change in an object's motion? |
Force |
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Which of the following forces is an example of a contact force? |
Frictional force |
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Which of the following forces is an example of a field force? |
Gravitational force |
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In the free-body diagram of the car shown above, which of the following is the Gravitational force acting on the car? |
(Downwards arrow) 14,700 N |
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In the free-body diagram of the car shown above, the 5,800N force (West arrow) represents... |
the backwards force the road exerts on the car |
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A free-body diagram of a ball in free-fall in the presence of air resistance would show... |
A downward arrow to represent the force of gravity and an upward arrow to represent the force of air resistance. |
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Which of the following is the tendency of an object to maintain its state of motion? |
Inertia |
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If a nonzero net force is acting on an object, then the object is definitely... |
being accelerated |
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According to Newton's second law, when the same force is applied to two objects of different masses... |
The object with greater mass with experience a smaller acceleration and the object with less mass will experience a greater acclereation. |
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A hockey stick hits a puck on the ice. Identify an action-reaction pair, and compare the forces exerted by each object. |
The stick exerts a force on the puck; the puck exerts a force on the stick. |
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The statement by Newton that for every action there is an equal but opposite reaction is which of his laws of motion? |
Third |
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Which are simulatnious equal but opposite forces resulting from the interaction of two objects? |
Action-reaction pairs |
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The magnitude of the force of gravity acting on an object is... |
weight |
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A change in the force of gravity acting on an object will affect the object's... |
weight |
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What is the common formula for work? |
W=Fd |
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Work is done when... |
the displacement is NOT zero |
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The more powerful the motor is... |
the shorter time interval it takes to do work. |
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A worker pushes a wheelbarrow with a horizontal force of 50.0N over a level distance of 5.0m. If a frictional force of 43N acts on a wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow? |
35 J |
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A child moving at a constant velocity carries a 2N ice-cream cone 1m across a level surface. What is the net work done on the ice-cream cone? |
0 J |
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A horizontal force of 200N is applied to move a 55kg TV set across a 10m level surface. What is the work done by the 200N force on the TV set? |
2000 J |
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Which of the following energy forms is the sum of kinetic energy and all forms of potential energy? |
mechanical energy |
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Which of the following energy forms is involved in winding a pocket watch? |
elastic potential energy |
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What is the kinetic energy of a 0.135kg baseball thrown at 40.0m/s? |
108 J |
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The main difference between kinetic energy and potential energy is... |
Kinetic energy involves motion and potential energy involves position |
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Which of the following energy forms is associated with an object due to its relative position to Earth? |
Gravitational Potential energy. |
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Which form of energy is involved in weighing fruit on a spring scale? |
elastic potential energy |
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Which of the following are examples of conservable quantities? |
mechanical energy and mass |
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Which of the following is the rate at which energy is transferred? |
Power |
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Which of the following equations is NOT an equation for power? |
P=(Fv)/t |
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Which of the following has the greatest momentum? |
A car with a mass of 1210kg moving at a velocity of 51m/s. |
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Which of the following has the greatest momentum? (pt.2) |
A tortoise with a mass of 270kg moving at a velocity of 0.5m/s. |
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What velocity must a 1340kg car have in order to have the same momentum as a 2680kg truck traveling at a velocity of 15m/s to the west? |
3.0x10^1 m/s to the west. |
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When comparing the momentum of two moving objects, which of the following is correct? |
The less massive object will have less momentum if the velocities are the same. |
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A baseball is pitched very fast. Another baseball of equal mass is pitched very slowly. Which of the following statements is correct? |
The fast-moving baseball is harder to stop because it has more momentum. |
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An ice skater initially skating at a velocity of 3m/s speeds up to a velocity of 5m/s. The momentum of the skater... |
increases |
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If a force is exerted on an object, which statement is true? |
A small force applied over a long period of time can produce a large change in the object's momentum. |
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The change in an object's momentum is equal to... |
the product of the force applied to the object and the time interval |
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Which of the following situations is an example of a visible change in momentum? |
A baseball is hit by a bat. |
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A 6.0x10^-2kg tennisball moves at a velocity of 12m/s. The bat is struck by a racket, causing it ti rebound in the opposite direction at speed of 18m/s. What is the change in the ball's momentum? |
-1.8 kg(m/s) |
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The impulse experienced by a body is equivalent to the body's change in... |
momentum |
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A large moving ball collides with a small stationary ball. The momentum... |
of the large ball decreases and the momentum of the small ball increases. |
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A soccer ball collides with another soccer ball at rest. The total momentum of the balls... |
remains constant. |
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The Low of Conservation of Momentum states that... |
The total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects. |
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An astronaut with a mass of 70.okg is outside a space capsule when the tether line breaks. To return to the capsule, the astronaut throws a 2.0kg wrench away from the capsule at a speed of 14m/s. At what speed does the astronaut move toward the capsule? |
0.4 m/s |
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After colliding, objects are deformed and lose some kinetic energy. What type of collision? |
Inelastic |
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Two billiard balls collide. What type of collision? |
Elastic |
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Two balls of dough collide and stick together. What type of collision? |
Perfectly inelastic |
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An ostrich with a mass of 146kg is running to the left with a velocity of 17m/s. What is its momentum? |
-2500 kg(m/s) |
