Advertisements
Advertisements
प्रश्न
Write the expression for work done by a force.
Advertisements
उत्तर
Work done by applying force F is the product of the force applied on the body and distance moved by the body in the direction of force, work done = Force x distance moved in the direction of the force.
W = F × d

APPEARS IN
संबंधित प्रश्न
Work done = Force × ........................................
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
Is work a scalar or a vector quantity?
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
What is meant by a translational motion? Give one example.
What is the relationship between Nm and dyne cm?
Fill in the boxe to show the corresponding energy transformation.

(i) A 200g ball is thrown vertically upward with an initial velocity of 30 ms-1. Draw a velocity-time graph for the motion of ball.
(ii) How long will the ball take to reach the highest point?
(iii) What will be the kinetic energy of ball, when it returns to the starting point, neglecting the air resistance?
(iv) What will be the potential energy of ball at highest point?
