Question

A motor drives a body along straight line, using a constant power. kinetic energy developed by motor varies with time as

Answer 1

A motor drives a body along straight line, using a constant power Kinetic energy developed by motor c=varies with time as-

Solution

$Force=F=constantma=Fa=F/mv=u+atu=0$So,

$v=at=Ft/m\to \left(1\right)Power=force\times velocty=F^{2}t/mPower=Kt$

Power is directly proportional to time, graph between power $\&t$ is straight line.