Physics Work and Energy Quiz

What is the work done by a force of 50 N applied horizontally to push a 10 kg box 3 m across a rough surface?

• 100 J

• 150 J

• 200 J

• 250 J

A 15 kg object starts from rest and is acted upon by a constant horizontal force that accelerates it at 2.5 m/s². After 4 seconds, what is its final speed?

• 8 m/s

• 10 m/s

• 15 m/s

• 20 m/s

If a 0.5 kg particle moving at 4 m/s has its speed increased to 6 m/s, what is the change in its kinetic energy?

• 5 J

• 10 J

• 12.5 J

• 15 J

A 2 kg object moving at 5 m/s has a kinetic energy of:

• 5 J

• 10 J

• 25 J

• 50 J

A 5 kg box is pushed along a rough horizontal floor for 3 meters with a horizontal force of 40 N, against a friction force of 10 N. What is the net work done on the box?

• 60 J

• 90 J

• 120 J

• 150 J

An object with a mass of 3 kg is at a height of 20 m above the ground. Taking gravitational acceleration as 9.8 m/s², what is its gravitational potential energy at that height?

• 58.8 J

• 196 J

• 294 J

• 588 J

A car in a roller coaster reaches the top of a hill at 25 m with zero speed. Assuming no energy loss, what will its speed be when it reaches the ground level? (g = 9.8 m/s²)

• 5 m/s

• 10 m/s

• 15 m/s

• 22.1 m/s

A 4 kg object has a kinetic energy of 32 J. What is its speed?

• 2 m/s

• 4 m/s

• 6 m/s

• 8 m/s

If a force of 10 N is applied to a 2 kg object over a distance of 5 m, what is the work done by the force?

• 10 J

• 20 J

• 40 J

• 50 J

A 1 kg object moves from point X to point Y, where it speeds up from 2 m/s to 5 m/s. What is the work done on the object during this motion?

• 10.5 J

• 12 J

• 15.5 J

• 17 J