# Answer on Mechanics | Relativity Question for pranay

Question #12222

a body of mass 10kg is at rest.calculate the force required to impact 20ms in 10 s

Expert's answer

Let's use the second Newton's law:

F = ma,

where F is required force, m is the mass of a body and a is the acceleration of a body. Here we need to find& acceleration at first:

a = [20m/s] / [10s] = 2m/s².

So,

F = 10kg * 2m/s² = 20 N.

F = ma,

where F is required force, m is the mass of a body and a is the acceleration of a body. Here we need to find& acceleration at first:

a = [20m/s] / [10s] = 2m/s².

So,

F = 10kg * 2m/s² = 20 N.

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