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47 Cards in this Set

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A measure of how far something travels in a certain period of time
A. speed
B. velocity
C. inertia
A measure of speed in a certain direction
A. speed
B. velocity
C. inertia
Speed is equal to what?
Distance divided by Time
Tendency of an object to stay at rest or to remain in motion unless an outside force causes a change
A. speed
B. velocity
C. inertia
What is needed to overcome inertia?
A force
When riding a bike, how do you overcome inertia?
By pushing on the pedals
What helps prevent people from continuing to move forward when a car stops quickly?
Seatbelts
When riding a bike what keeps it moving forward even after you stop applying force?
Inertia
What will slow a bike down?
The drag of the air or the roughness of the ground
What is the force that causes objects to fall toward the earth?
Gravity
For every action there is what?
An equal and opposite reaction
When you take a step forward and push down on the earth, the opposite force is what?
The earth pushing back with equal strength
A force that acts to pull pairs of objects together
A. gravity
B. mass
C. weight
D. acceleration
The amount of matter in an object
A. gravity
B. mass
C. weight
D. acceleration
The force gravity exerts on an object's mass
A. gravity
B. mass
C. weight
D. acceleration
The rate of change in speed of direction of movement
A. gravity
B. mass
C. weight
D. acceleration
What always stays the same?
Your mass
What can change if you travel to another planet?
Weight
If you shoot an arrow into the air, what brings it back to earth?
Gravity
Could you jump higher and farther on the moon or here and why?
On the moon, because the force of gravity is less on the moon
If you have greater mass the gravitiional attraction will be more or less?
More
If you have less mass the gravitional attraction will be more or less?
Less
The greater the distance the more or less gravitional attraction?
Less
The less the distance the more or less gravitional attraction?
More
What accelerates (goes faster) the rate at which objects fall?
Gravity
Objects will fall faster as the distance between the earth and the object what?
Decreases
A force that resists the movement of one surface past another surface
A. friction
B. air resistance
C. streamline
Friction causes by gas molecules in the air hitting an object and slowing it down
A. friction
B. air resistance
C. streamline
To design smooth, rounded surfaces on an object so it slips through the air with the least possible resistance
A. friction
B. air resistance
C. streamline
What surfaces produce the least amount of friction?
Smooth, slippery, icy or waxed surfaces
Rough bumpy surfaces produce greater what?
Friction
Why do wheels make a suitcase easier to move?
Because they produce less friction
What slows the motion of objects?
Air resistance
If an object has a streamlined design, what is the object designed to do?
Reduce the air resistance
When applying brakes on ice you will want to do what to the friction to prevent slipping?
Increase the friction
When moving heavy objects what do you want to do to the friction to help moving the object?
Decrease the friction
A force that resists the movement of one surface past another surface
A. friction
B. air resistance
C. streamline
Friction causes by gas molecules in the air hitting an object and slowing it down
A. friction
B. air resistance
C. streamline
To design smooth, rounded surfaces on an object so it slips through the air with the least possible resistance
A. friction
B. air resistance
C. streamline
What surfaces produce the least amount of friction?
Smooth, slippery, icy or waxed surfaces
Rough bumpy surfaces produce greater what?
Friction
Adding oil or grease between sliding surfaces will do what to friction, increase or reduce it?
Reduce friction
Will applying brakes to wheels increase or reduce friction?
Increase friction
When you put sand or gravel on icy ground will that increase or reduce friction?
Increase friction
When adding wax to a smooth floor, will that increase or reduce friction?
Reduce friction
When adding wheels to a heavy chair, will that increase or reduce friction?
Reduce friction
Science Flashcards
Unit B Chapter 2
Investigating Motion
Science Flashcards
Unit B Chapter 2
Investigating Motion