Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
According to the scientific method, how does a physicist formulate and objectively test hypotheses?
|
By conducting experiments.
|
|
|
What are the SI base units for length, mass, and time?
|
Length - meter
Mass - kilogram Time - second |
|
|
The SI unit of acceleration is?
|
m/s^2
|
|
|
The most appropriate SI unit for measuring length of an automobile is?
|
Meter
|
|
|
The radius of earth is 6,370,000 m. Express in scientific notation.
|
6.38x10^3 km
|
|
|
What are the SI units of velocity?
|
m/s
|
|
|
When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
|
The car slows down.
|
|
|
A sports car traveling at 24.7 m/s slows at constant rate to a stop in 16.00s.... What is displacement?
|
198 m
|
|
|
A soccer ball is moving horizontally at the speed of 4.0 m/s. It then undergoes a constant acceleration. After 8.00s the ball is moving at 4.8 m/s. What is displacement?
|
35.2 m
|
|
|
When there is no air resistance, objects of different masses dropped from rest...
|
Fall with equal displacements.
|
|
|
Which would hit the ground first if dropped from the same height in a vaccum- a feather or metal bolt?
|
They would hit at the same time.
|
|
|
Acceleration due to gravity is also called?
|
Free-fall acceleration.
|
|
|
For the winter, a duck flies 10.0m/s due south against a wind with a speed of 2.5m/s....
|
75m/s south
|
|
|
What is a physical quantity that has a magnitude but no direction?
|
Scalar.
|
|
|
What is a physical quantity that has both magnitude and direction?
|
Vector.
|
|
|
What is the cause of an acceleration?
|
Force.
|
|
|
If a nonzero net force is acting on an object, then the object is definitely...
|
Being accelerated.
|
|
|
A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situation.
|
The hammer exerts a force on the nail; the nail exerts a force on the hammer.
|
|
|
A change in the gravitational force acting on an object will affect the object's...
|
Weight.
|
|
|
According to Newton's second law, when the same force is applied to two objects of different masses...
|
The object with greater mass will experience a smaller acceleration and the object with less mass will experience a greater acceleration.
|
|
|
The newton is the SI unit of what physical quantity?
|
Force.
|
|
|
What physical quantity is the measure of the amount of inertia of an object?
|
Mass.
|
|
|
In a game of tug-o-war a rope is pulled by a force of 182 N to the right....
|
74 N to the right.
|
|
|
A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot....
|
0.22 m/s^2
|
|
|
A 90 kg person stands 1.00 m from a 60.0 kg person....
|
3.6x10^-7 N
|
|
|
A wagon having a mass of 91 kg is accelerated across a level road at 0/97 m/s^2....
|
88 N
|
|
|
A coin released at rest from the top of a tower hits the ground after falling 5.7s.....
|
-56m/s
|
|
|
A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south.
|
The child has greater momentum than the bike.
|
|
|
The change in an objects momentum is equal to...
|
The product of the force applied to the object and the time interval.
|
|
|
A 0.2 kg baseball is pitched with a velocity of 40 m/s.....
|
20 kg x m/s
|
|
|
The impulse experienced by a body is equivalent to the body's change in....
|
Momentum.
|
|
|
A 20kg shopping cart moving at a velocity of 0.5 m/s collides with a store wall and stops. The momentum...
|
Decreased.
|
|
|
A person sitting in a chair with wheels stands up...
|
Was zero while stationary and increased when the person stood.
|
|
|
A soccer ball collides with another soccer ball at rest. Total momentum is...
|
Neither gained or lost.
|
|
|
A rubber ball moving at the speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. The momentum...
|
Remained the same.
|
