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