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25
Physics
11/04/2012

Term
 which of the following has the largest momentum relative to the earths surface?
Definition
 a pick up truck speeding along a highway
Term
 a freight train rolls along a track with a considerable momentum. if it rolls at the same speed but has twice as much mass, its momentum is...
Definition
 doubled
Term
 is it correct to tsay that impulse is egual to...
Definition
 the change in momentum it produces
Term
 the conversation of momentum is closely related to....
Definition
 newtons third law
Term
 a rifle recoils while firing a bullet. the speed of the rifle's recoil is small because the.....
Definition
 rifle has much more mass than the bullet
Term
 suppose that a tiny gun made of a strong but very light material fires a bullet tha tis more massive that the gun itself. for such a weapon....
Definition
 the target would be safer than a shooter.
Term
 two object have the same size and shape, but one is uch heavier than the other. when they are dropped simultaneously froma tower, they reach the ground at the same time, but the heavier one has greater....
Definition
 momentum.
Term
 a large heavy truck and a small baby carriage roll down a hill. neglecting friction, at the bottom of the hill, the baby carriage will have greater....
Definition
 none of these.
Term
 to catch a ball, a baseball player extends the hand forward before impact with the ball and then lets it ride backward in the direction of the ball;s motion. doing this reduces the force of the impat on the players hand principally because the.....
Definition
 time of impact is increased
Term
 when you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff legged landing. in this way, the average force your body experiences is....
Definition
Term
 when you are in the way of a fast moving object, and cant get out of its way, you will suffer a smaller force of impact if you decrease it momentum over a....
Definition
 long time
Term
 a bullet is fired from a gun. the speed of the bullet will be about the same as the speed of the recoiling gun
Definition
 if the mass of the bullet equals the mass of the gun
Term
 padded dashboards in cars are saffer in an accident than nonpadded ones because an occupant hitting th edash has...
Definition
 increased time of impact
Term
 the forece on a apple hitting th eground depends upon...
Definition
 the speed, the time, whether or not the apple bounces.
Term
 comapred to falling on a stone floor, a wine glass may not break when it falls on a carpeted floor becaue the....
Definition
 stopping time is lomger on the carpet
Term
 two billiard balls having the same mass and speed roll toward each other, what is their combined momentum after they meet?
Definition
 0
Term
 the force that accelerates a rocket in outer space is exerted on the rocket by the...
Definition
 rockets nose cone
Term
 a peice of putty moving with 1 unit of momentum strikes andsticks to a heavy bowling ball that is initally at rest. after the putty sticks to the ball, both move with a combined momentum of...
Definition
 1 unit
Term
 a karate expert executes a swift blow and breaks a cemtn block with their bear hand. the magnitude of the force experienced by the hand is...
Definition
 identical to the force applied to the block.
Term
 a heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. compared to the force that stops the car, the force needed to stop the truck is..
Definition
 greater
Term
 recoil is noticable if we throw a heavy ball while standing on rollar skates. if instead we go through the motions of throwing the ball but hold onto it, our net recoil will be...
Definition
 zero
Term
 a ball moving at 3m/s and has a momentum of 48 kg m/s. what is the balls mass?
Definition
 16 kg
Term
 a 4 kg ball has a momentum if 12 kg m/s. what is the balls speed?
Definition
 3m/s
Term
 the change in momentum, in kg m/s that occurs when a 1.0 kh nball travelling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s is...
Definition
 6
Term
 a large metal ball is shot froma cannon with a short barrel. if the same ball were to be shot from a cannon with a longer barrel, its muzzle velocity would be...
Definition
 more.
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