Work done by a constant force Knowledge-Based Download PDF

Physics · Energy, Work & Power · Physics · Work

3 Physics practice questions on Work done by a constant force. Questions that assess core concepts and understanding.

Questions

1.
A student carries an 80 N backpack across a level hallway at a constant velocity, covering a horizontal distance of 5.0 m while exerting a constant upward force of 80 N. How much work is done on the backpack by this upward vertical force?
- A) 400 J
- B) -400 J
- C) 16 J
- D) 0 J
2.
A constant braking force of 75 N is applied to a bicycle moving along a straight horizontal path, bringing it to a stop over a distance of 14 m. What is the work done by the braking force on the bicycle?
- A) 1050 J
- B) 525 J
- C) -525 J
- D) -1050 J
3.
A crate is pulled across a smooth horizontal floor by a constant force of 40 N directed at an angle of $60^\circ$ above the horizontal. How much work is done by this force as the crate moves a distance of 6.0 m?
- A) 240 J
- B) 120 J
- C) 208 J
- D) 60 J