Question

A body of mass m is accelerated uniformely from rest to a speed V in a time T. The instantaneous power delivered to the body as a function of time is given by

Answer 1

Answer:

From v=u+at,v

1

=0+at

1

∴a=

t

1

v

1

F=ma=mv

1

/t

1

Velocity acquired in t sec=at=

t

1

v

1

t

Power=F×v=

t

1

mv

1

×

t

1

v

1

t

=

t

1

2

mv

1

2

t