Question

How does the momentum of an object change if the object’s velocity doubles?


a. The momentum doubles.

b. The momentum increases by a factor of four.

c. The momentum decreases by a factor of 1/2.

d. The momentum decreases by a factor of 1/4.
11.What are the units of momentum?


a. N

b. J

c. kg•m/s

d. kg•m/s2
12.Which of the following can determine the magnitude of the change in an object’s momentum?


a. mass and acceleration

b. force and time interval

c. force and distance

d. acceleration and time interval
13.If a net force acts on an object, then the object’s momentum
(1 Point)

a. will increase.

b. will decrease.

c. will either increase or decrease.

d. may or may not change.
14.Which of the following involves a change in momentum?


a. A bowling ball rolls down the lane at constant speed.

b. A car coasts down a hill at constant speed.

c. A sky diver descends with terminal velocity.

d. A spacecraft travels at constant speed while slowly losing mass.
15.Energy that is due to the motion of an object is


a. kinetic energy.

b. potential energy.

c. gravitational potential energy.

d. elastic potential energy.
16. Energy stored in the gravitational field of interacting bodies is


a. kinetic energy.

b. nonmechanical energy.

c. gravitational potential energy.

d. elastic potential energy.
17. Energy associated with a compressed or stretched object is


a. kinetic energy.

b. potential energy.

c. gravitational potential energy.

d. elastic potential energy.
18.Friction within machinery increases efficiency.


True

False
19.Potential energy is the energy an object has due to its volume


True

False
20.If the sign of work is negative


the displacement is in the direction opposite the force.

the displacement is perpendicular to the force.

no work is done.

the displacement is in the same direction as the force.
21.the 2 quantities that affect the kinetic energy are the mass and the area of the object


True

False
22.Gravitational potential energy of the object varies with its height

True

False

Answer 1

Answer:

omg so big q. sorry