Question

a constant retarding force of 15 N is applied to a body of mass 20 kg moving initially with a speed of 15 meter per second . How long does the body take to stop ?​

Answer 1

Answer:

Time= 20sec

Explanation:

F=ma

∴-15=ma

∴-15=20 x (v-u)/t

∴-15/20=(0-15)/t

∴-3/4 x t = -15

∴t= -15 x 4/-3

∴t=5 x 4

∴t=20 sec

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