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Question : A body of mass 4 kg accelerates from 15 m/s to 25 m/s in 5 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

Option 1: 32

Option 2: 8

Option 3: 16

Option 4: 64


Team Careers360 8th Jan, 2024
Answer (1)
Team Careers360 16th Jan, 2024

Correct Answer: 8


Solution : The correct answer is 8.

Force = Mass(m)* Acceleration(a)

Acceleration of the body is to be calculated first:

Acceleration(a)= Change in Velocities (v-u)/Time Taken(t),

where v=Final velocity and u =Initial Velocity

a = (v-u) / t

a = (25-15) / 5

a = 2 m/s²

Now, the force applied to the body is:

F=m*a

F = (4)(2)

F = 8 N

As a result, the force's magnitude is 8 N .

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