Question

200n force is applied on a body of mass 25kg . how much time will the body take to travel 64m from rest? ​

Answer 1

Answer:

since the object starts from rest we take Initial Velocity to be 0 m/s. But time cannot be negative. Hence + 4 is the answer. Hence the body takes 4 seconds to cover a displacement of 64 m with mass 25 kg

Explanation:

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Answer 2

Initial Velocity (u) = 0m/s

Distance Travelled (S) = 64 m

Time taken (t) = unknown

Force (F) = 200N

Mass (m) = 25kg

But, Force = Mass×(Acceleration)

F = m×a

200N = 25kg × a

a = 200/25

a = 8 m/s

Using the relation:

S = ut + 1/2 at^2

=> 64 = 0(t) + 1/2(8)(t^2)

=> 64 = 4t^2

=> t^2 = 16

=> t = 4sec

Hence, time taken to cover 64m by the body is:

t = 4 seconds.