Question

A body of 2 kg is kept at rest. A constant force of F starts acting on it.
If the body move through a distance of 10 m in 2 sec. find F.

Answer 1

Answer:

Step-by-step explanation:

We are given a body whose mass is given as

m=1kg

This body is kept at rest so its initial velocity is given as

u=0m/s

A constant force is acting on this body whose magnitude is given as

F=6N

Now from Newton’s second law of motion we can find out the acceleration of the given mass. This can be done in the following way.

F=maa=Fm

Inserting the value of force and mass, we get

a=61=6m/s2

We want to move this body using the above force through a distance which is given as

S=12m

So we can make use of the second equation of motion in order to obtain the time taken to move the mass through the above distance.

S=ut+12at2

Inserting the known values, we get

12=0+12×6×t2t2=123=4t=2s