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Date	May 2018	Marks available	1	Reference code	18M.1.HL.TZ2.7
Level	Higher level	Paper	Paper 1	Time zone	2
Command term		Question number	7	Adapted from	N/A

Question

A ball of mass m collides with a vertical wall with an initial horizontal speed u and rebounds with a horizontal speed v. The graph shows the variation of the speed of the ball with time.

M18/4/PHYSI/HPM/ENG/TZ2/07

What is the magnitude of the mean net force on the ball during the collision?

A. $\frac{{m(u - v)}}{{({t_2} + {t_1})}}$

B. $\frac{{m(u - v)}}{{({t_2} - {t_1})}}$

C. $\frac{{m(u + v)}}{{({t_2} + {t_1})}}$

D. $\frac{{m(u + v)}}{{({t_2} - {t_1})}}$

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Core » Topic 2: Mechanics » 2.4 – Momentum and impulse

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