- A force of 80. N pushes a 50. kg object across a level floor for 8.0 m. The work done is
- 10 J
- 400 J
- 640 J
- 3920 J

- A constant force of 20 N applied to a box causes it to move at a constant speed of 4.0 m/s. How much work is done on the box in 6.0 s ?
- 80 J
- 240 J
- 120 J
- 480 J

- A force of 3 N moves a 10 kg mass horizontally a distance of 3 meters at constant velocity. The work done against friction is
- 6 J
- 30 J
- 3 J
- 9 J

- The work required to raise a 10. kg box from the surface of the Earth to a height of 5.0 m is
- 50 J
- 100 J
- 200 J
- 490 J

- Which is a scalar quantity ?
- acceleration
- momentum
- force
- work

- What is the amount of work done when a force of 5 N moves a 10 kg mass a horizontal distance of 4 m ?
- 5 J
- 20 J
- 40 J
- 50 J

- As an object slides across a horizontal surface, its gravitational PE will
- decrease
- increase
- remain the same
- cannot be determined

- Which mass has the greatest gravitational PE with respect to the floor ?
- 50 kg mass resting on the floor
- 2 kg mass 10 m above the floor
- 10 kg mass 2 m above the floor
- 6 kg mass 5 m above the floor

- If the speed of an object is doubled, its kinetic energy will be
- halved
- doubled
- quartered
- quadrupled

- If the Kinetic energy of a 10. kg mass is 80 J, its speed is
- 1 m/s
- 0.125 m/s
- 8 m/s
- 4 m/s