Question

A body starts from rest. If it travels with an acceleration of 2m /s2, its displacement at the end of 3 second is?​

Answer 1

Explanation:

here,

the beginig velocity, u=0m/s

time,t=3s

accelaration,a=2ms^-2

displacement,s=?

we know that,

• s=ut+1/2at2
• s=1/2×3×2^2
• s=6m

so, the displacement is 6m.

Hope its help you, Thanks.

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Answer 2

Given: A body starts from rest and travels with an acceleration of 2ms⁻².

To find: Displacement of the body at the end of 3 seconds.

Solution:

• For a body in uniformly accelerated motion, the displacement is given by the following formula,

        $S = ut + \frac{1}{2} at^{2}$

• Here, S is the displacement of the body, u is the initial velocity of the body, t is the time period of the travel and a is the acceleration produced by the body.

• The initial velocity of the body is equal to zero because the body starts from rest.

• So,

       $S = (0ms^{-1}) (3s) + \frac{1}{2} (2ms^{-2})(3s)^{2}$

       $S = 9m$

Therefore, the displacement at the end of 3 seconds is 9m.