Avinash can run with a speed of 8 m/s against the frictional force of 10 N, and Kapli can move with a speed of 3 m/s against the frictional force of 25 N. Who is more powerful and why ?

A force of 10 N moves a body with a constatn speed of 2ms^-1 . Calculate the power of the body?

What is de-Broglie waveelngth of a 3 kg object moveing with a speed of 2 m s^(-1) ?

A hill is 500 m high. Supplies are to be sent across the hill using a canon that can hurl packets at a speed of 125 m//s over the hill. The canon is located at a distance of 800m from the foot of hill and can be moved on the ground at ba speed of 2 m//s, so that its distance from the hill can be adjusted. What is the shortest time in which a packet can reach on the ground across the hill? Take g= 10 m//s^(2) .

A body of mass 0.40 kg moving initially with a constant speed of 10 m s^-1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = -5 s, 25 s, 100 s.

A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be

An elevator can carry a maximum load of 1800 kg (elavator + passengre) is moving up with a constant speed of 2 m s^(-1) .The frictional force opposing the motion is 4000 N.Determine the minimum power dilivered by the motor to the elevator in watts as well as in horse power.

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the:- work done by the net force on the body in 10 s.