Physics SM2 Review

In an inelastic collision, as compared to an elastic collision, what is to be expected?

• Momentum is conserved and energy is conserved.

• Momentum is conserved and energy is not conserved.

• Momentum is not conserved and energy is conserved.

• Momentum is not conserved and energy is not conserved.

A 2kg ball is moving at 3 m/s. What is the momentum of the ball?

• 0.66

• 2

• 3

• 6

Which of the following objects has the greatest momentum.

Object 1: 5kg moving 2m/s

Object 2: 10kg moving 2m/s

Object 3: 2kg moving 20m/s

Object 4: 1kg moving 3m/s

• Object 1

• Object 2

• Object 3

• Object 4

A dart with a mass of 50 g is thrown at 15 m/s and sticks into a 100-g apple hanging on a string. What is the velocity of the dart and apple just after the dart is embedded?

• 0 m/s

• 5 m/s

• 10 m/s

• 15 m/s

Two billiard balls of equal mass collide. If ball A was moving to the right at 2 m/s and ball B was moving to the left at 3 m/s, what is the final velocity of ball A after the collision if its perfectly elastic?

• 3 m/s to the right

• 3 m/s to the left

• 2 m/s to the right

• 2 m/s to the left

As the temperature of a fluid decreases—

• The number of inter-particle collisions and random movement of particles decrease.

• The number of inter-particle collisions and random movement of particles increase.

• The number of inter-particle collisions increase and random movement of particles decrease.

• The number of inter-particle collisions decrease and random movement of particles increase.

For Object 1 to have a higher absolute temperature than Object 2, Object 1 must have a —

• higher mass

• higher average internal potential energy

• higher average internal kinetic energy

• higher specific heat

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and —

• work

• mass

• force

• pressure

The energy in a wave form is most directly related to its -

• wavelength

• frequency

• wave speed

• amplitude

Which part of the electromagnetic spectrum has the largest wavelengths?

• radiowaves

• microwaves

• infrared light

• ultraviolet light