Physics (Chps. 6-8): Question Preview (ID: 8239)

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When a baseball player follows through with their swing, which of the following is true?
a) impact time decreases, ball goes further
b) impact time increases, ball goes further
c) impact time increases, ball goes shorter
d) impact time decreases, ball goes shorter

How much force is needed to accelerate a 4.0 kg physics book to an acceleration of 2.0 m/s^2?
a) 2.0 N
b) 0.5 N
c) 8.0 N
d) 24.0 N

When 2 objects collide and they stick together, the collision is said to be
a) elastic
b) inelastic
c) perfectly elastic
d) both elastic and inelastic

As area increases pressure
a) decreases
b) increases
c) does not change

Which has more momentum, a large truck moving at 30m/s or a small truck moving at 30 m/s?
a) Both have the same momentum
b) The large truck
c) The small truck
d) k

A freight train rolls along a track with considerable momentum. If it were to roll at the same speed but had twice as much mass, its momentum would be
a) zero
b) unchanged
c) cut in half
d) doubled

A 4.0 kg ball has a momentum of 24.0 kgm/s. What is the ball's speed?
a) 0.2 m/s
b) 6.0 m/s
c) 80 m/s
d) 20 m/s

True or false: Impulses are usually smaller when an object is bouncing.
a) False
b) True

Momentum is defined as an object's
a) mass times velocity
b) forces times time interval
c) mass times acceleration
d) force times acceleration

Pressure is measured in
a) pascals (Pa)
b) newtons (N)
c) kilograms times meter per second (kg m/s)
d) kilograms (kg)

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