An object of mass travels along a horizontal air track at a constant speed and…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

40. An object of mass

M

travels along a horizontal air track at a constant speed

v

and collides elastically with an object of identical mass that is initially at rest on the track. Which of the following statements is true for the two objects after the impact? (A) The total momentum is

M v

and the total kinetic energy is

1 / 2 M v^{2}

(B) The total momentum is

M v

and the total kinetic energy is less than

1 / 2 M v^{2}

M v

and the total kinetic energy is

\frac{1}{2} M v^{2}

(D) The momentum of each object is

\frac{1}{2} M v

Related theory

Collisions
Collisions in one dimension
Work, Energy and Power
Conservation of momentum
Linear momentum
Types of collisions (elastic and inelastic)
Elastic and inelastic collisions

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