Question

a force of 2n acting on a body changes its velocity uniformly from 2m/s to 5m/s in 10 sec.calculate the mass of the body

Answer 1

F = mdv/dt
m = Ft/(v - u)
m = 2 * 10 / (5 - 2)
m = 20/3
m = 6.66 kg

Mass of the body is 6.66kg

Answer 2

ANSWER
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FORCE = 2 NEWTON

Acceleration,
Final velocity (v) = 5 m/s
Initial velocity (u) = 2 m/s
time (t) = 10 sec

Acceleration = (v - u) / t
=( 5 - 2) / 10
= 3/10

FORCE = MASS × ACCELERATION
2 N = MASS × 3/10
MASS = 2 × 10/3

MASS = 20/3 kg

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ANSWER= 20/3 kg or 6.66 kg

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