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