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23 Cards in this Set
- Front
- Back
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As the speed of an object doubles, what happens to the energy of the object?
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Increases
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Forces that occur in pairs is which of Newton's law?
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3rd law
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When two billard balls collide it is an example of what type of collision?
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elastic
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What are the units for momentum?
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Kg x m/sec
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Why do air bags reduce injuries in collisions?
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Increase time
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What are impulse units?
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Kg x m/sec
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Energy due to position is called?
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potential
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The unit for energy is?
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Joule
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The ability to cause a change is the defition for what?
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energy
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Works unit is?
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Joule
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When two objects hit each other it is called?
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collision
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When a tennis ball is thrown into the air which type of energy is greatest as it leaves your hand?
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kinetic
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When the tennis ball has momentarily stoped in the arc, which energy is highest?
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Potential
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Which formula would you use to calculate momentum?
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p=mxv
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which formula would you use to calculate speed?
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Ft=mv2-mv1
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What formula would you use to calculate impulse?
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Ft=mv2-mv1
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What formula would you use to calculate potential energy?
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mgh
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What formula would you use to calculate work?
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W=Fd
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What formula would you use to calculate kinetic energy?
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1/2 mv2
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Calculate the momentum of a 15 kg bicucle moving at a speed of 4.0 meters per second. Units too.
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60 kg x m/sec
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Calculate the speed of a .35 kg marble that was propelled by a marble launcher at rest applying a force of 10 newtons for .50 secs.
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14.29 m/sec
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Calculate the impulse that must be supplied to stop a 150 kg cart rolling on a flat path at a speed of 6.5 meters per second.
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-975 kg x m/sec
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A 4kg piece of clay moving at a speed of 8m/sec strikes a second 8 kg piece of clay moving at 2m/sec in the opposite direction. Calculate the speed of the combined piece of clay.
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4m/sec
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