Question

A boy is moving on a

straight road against frictional force of SN. After travelling a distance of 15 km, he forgot the correct path at a round about of radius 100 m as shown in figure However he moves on the cưcular path for one and half eye and then he moves forward up to 2 km Calculate the work done by him​

Answer 1

Answer:

Because,frictional force is non-conservative force so the total travelling distance=1500m+2000m+(1.5×2×3.14×100)=4442m

frictional force=5N

so,the work done=F.S=5×4442=22210J.

Explanation: