Energy of a body is defined as its capacity of doing work. A body of mass 5 kg initially at rest is subjected to a horizontal force of 20 N. What is the kinetic energy acquired by the body at the end of 10 s?

Energy of a body is defined as its capacity of doing work. A body of m

1.	Energy of a body is defined as its capacity of doing work. A body of mass 5 kg initially at rest is subjected to a horizontal force of 20 N. What is the kinetic energy acquired by the body at the end of 10 s?
Answer» SOLUTION :`a=F/m=20/5=4ms^-2` `v=u+at=0+4xx10=40ms^-1` `KE=1/2mv^2=1/2xx5xx(40)^2=400J`