Question

a body at rest has a mass of 3 kg. A force of 12 N acts on it for 4s. calculate its velocity and change in momentum.
Give the answer with full explanation.​

Answer 1

Answer:

p  = 48 Kg . m/s    , v = 16 m/s

Explanation:

mass of body , m = 3 kg

force on body , f = 12 N

time , t = 4 s

∴ f = ma

a = f/m

a = 12/3 = 4 m/s²

∴ velocity = acceleration × time

v = at

v = 4 × 4 = 16 m/s

∴ momentum = mass × velocity

p = mv

p = 3 × 16 = 48 Kg . m/s

Answer 2

Answer:

this is the answer

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