O-LevelPhysicsEnergy & Work5054/12 · Oct/Nov 2023 · Q111 Mark
A box with mass 4.0 kg is pulled from rest along a horizontal floor by a constant force F. A constant frictional force of 1.0 N acts on the box. When the box has travelled 1.0 m its velocity is 1.5 m/s. The kinetic energy of the box is equal to the work done on the box. What is force F?
A2.0 N
B3.5 N
C4.0 N
D5.5 N
✓ Correct answer
D: 5.5 N
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