Physics Ch 6 Review Multiple Choice

a freight train rolls along a track with considerable momentum. if this roll at the same speed but has twice as much mass, it momentum is

doubled

Compared to falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the

stopping time is longer on the carpet

Two billiard balls having the same mass and speed roll toward each other. What is their combined momentum after they meet?

0

a ball is moving at 3 m/s and has a momentum of 48 kg m/s. what is the balls mass?

16 kg

a 1000-kg car moving at 10 m/s brakes to a stop in 5 s. the average breaking force is

2000 N

the conservation of momentum is most closely related to

Newtons 3rd law

the impulse-momentum relationship is a direct result of

Newtons second law

which of the following has the largest momentum relative to Earths surface? a tightrope walker crossing Niagara Falls, a Mack truck parked in a parking lot, a pickup truck speeding along the highway, or a dog running down the street

a pickup truck speeding along the highway

a karate expert executes a swift blow and breaks a cement block with her bare hand. the magnitude of the force experienced by her hand is

identical to the force applied to the block

two object have the same size and shape, but one is much heavier than a the other. when they are dropped simultaneously from a tower, they reach the ground at the same time, but the heavier one has a greater

momentum

A car traveling along the highway needs a certain amount of force exerted on it to stop it in a certain distance. More stopping force may be required when the car has

more momentum, more mass, and less stopping distance

it is correct to say that impulse is equal to

the change in momentum is produces

Suppose that a tiny gun made of a strong but very light material fires a bullet that is more massive than the gun itself. For such a weapon

the target would be safer than the shooter

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 balls motion =. doing this reduces the force if impact on the players hand principally because the

time of impact is increased