1. How much is the work done in pulling up a block of wood weighing 2KN for alength of 10m on a smooth plane inclined at an angle of
A. 1.732 KJ
B. 17.32 KJ
C. 10 KJ
D. 100 KJ
Answer : Option B
Explanation :
W=Fd cos\Theta
2. A force of 7N, making an angle
3. A 60 kg JATAN with 10 kg load on his head climbs 25 steps of 0.20m height each.what is the work done in climbing ? (g = 10 m/
4. A ball of mass 5 kg is stiding on a plane with intial velocity of 10 m/s. If co-efficient of friction between surface and ball is
The relationship between force and position is shown in the figure given (in one dimensional case) calculate the work done by the force in displacing body from x = 0 cm to x = 5 cm
6. The force constant of a wire is K and that of the another wire is 3k when both the wires are stretched through same distance, if work done are
7. A ball is released from the top of a tower. what is the ratio of work done by forceof gravity in first, second and third second of the motion of the ball ?
8. A spring of spring constatnt
9. The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a speed of 36 km/h ?
10. A body of mass 6 kg is under a force, which causes a displacement in it given by