Work And Energy Mock Tests

An object of mass 100 kg is kept at a height of 5 m above the ground. If it is dropped, what is its kinetic energy just before hitting the ground? (Take g = 10 m/s²)

A body of mass 2 kg is moving with a constant speed of 6 m/s. A force is applied to it such that its speed increases to 12 m/s in 3 seconds. What is the average power delivered by the force during this interval? (Take g = 10 m/s²)

What is the SI unit of work?

A variable force F(x) = (3x² + 2x) N acts on a particle moving along the x-axis. What is the work done by this force in moving the particle from x = 0 to x = 3 m?

A force F(x) = (3x² + x) N acts on a particle moving along the x-axis. The work done by this force in moving the particle from x = 1 m to x = 3 m is:

A body of mass 1 kg moves in a straight line with velocity v = 3t m/s, where t is in seconds. The work done by the net force during the first 2 seconds of motion is:

A force F = (2x + 3) N acts on a particle in the x-direction, where x is in metres. The work done by this force in displacing the particle from x = 1 m to x = 3 m is:

An object of mass 10 kg is lifted to a height of 5 m. What is the work done against gravity? (g = 10 m/s²)