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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
State the energy transformation on the following:
Electricity is obtained from solar energy.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
Give two examples of couple action in our daily life.
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.
A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.
Force acting on a particle moving in a straight line varies with the velocity of the particle v as F = `K/v`, where K is a constant. The work done by this force in time t is
