Seema tried to push a heavy rock of 100 kg for 200s but could not move it. Find the work done by Seema at the end of 200s.

A block is pushed by a force F = 10 N. A frictional force of 2 N acts between the block and the surface. Find the work done by the friction when the block moves 10 m.

A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves the barrel of the rifle at a vleocity of 100 m/s. If the bullet takes 0.003 second to move out of the barrel, calculate the force experienced by the rifle due to its recoil. Initially rifle+Bullet system at rest

10 joule of work must be done to move a charge of -200 C from the point A to point B. Which of the two points is at higher potential?

An athlete completes one round of a circular track of diameter 200m in 40s. What will be the distance covered and the displacement at the end of 2 min 20s?

Light of wavelength 3000 overset @A is incident on a double slit in Young.s double slit experiment. If the overall separation of 10 fringes on a screen 200 cm away is 1.0 cm, find the distance between the two slits.

Light of wavelength 3000 overset@A is incident on a double slit in Young.s double slit experiment. If the overall separation of 10 fringes on a screen 200 cm away is 0.6 cm, find the distance between of two slits.

The displacement x of a body of mass 10 kg moving in one dimension under the action of a constant force is related to time by the equation t = sqrtx + 3 . Find the work done by the force in first 5 seconds.

A rain drop of radius 2 mm falls from a height of 500 nr above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey ? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s^-1 ?

An athlete completes one round of a circular track of diameter 200m in 40 s. What will be the distance at the end of 2minutes 20s?