Question

A force of 1.0N acts on a body of mass 10kg. As a result, the body covers 100cm in 4 seconds moving along a straight line. Find the initial velocity

Answer 1

Hope you understand

Answer 2

The initial velocity of the body is 0.05 m/s.

Explanation:

Given that,

Force, F = 1 N

Mass of the body, m = 10 kg

Distance covered by the body, d = 100 cm = 1 m

Time, t = 4 s

The force acting on the body is given by :

$F=ma$

$a=\dfrac{F}{m}$

$a=\dfrac{1}{10}=0.1\ m/s^2$

Let us is the initial velocity of the body. It can be calculated using second equation of motion as :

$d=ut+\dfrac{1}{2}at^2$

$1=4u+\dfrac{1}{2}\times 0.1\times (4)^2$

u = 0.05 m/s

So, the initial velocity of the body is 0.05 m/s.

Learn more,

Equation of motion

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