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A Body of Mass 50g is Moving with the Velocity of 10 Ms-1. It is Brought to Rest by a Resistive Force Of 10 N - ICSE Class 10 - Physics

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Question

A body of mass 50g is moving with the velocity of 10 ms-1. It is brought to rest by a resistive force of 10 N Find.

1) the retardation and 

2) the distance that the body will travel after the resistive force is applied.

Solution

Mass of body = 50g = 0.050 kg

intial velocity,  u = 10 m/s

Final velocity, v = 0 m/s

Resistive force, F = 10 N

1) Force, F= ma

10N  = 0.050 x a

Acceleration, a = 10/00.5 = 2000 ms-2

Retardation = - acceleration  = 200 ms-2

2) From equation `v^2 - u^2 = 2as`

`0^2 - (10)^2 = 2 xx  (-200) xx s`

`-100 = -400 xx s`

S = 100/400 = 0.25 m = 25 cm

  Is there an error in this question or solution?
Solution A Body of Mass 50g is Moving with the Velocity of 10 Ms-1. It is Brought to Rest by a Resistive Force Of 10 N Concept: Concept of Force.
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