Q1: A box is pushed by a horizontal force F = (2x+2) N to move on a smooth ground. Calculate the work done by the F for x = 2 m to 8 m.
Q2: In the scenario ahead, if the box is initially at rest and the mass of the box is 10 kg. Calculate: (1) the change of kinetic energy when the box pass through x = 5m.
(2) The velocity of the box at x = 5m.
Q3: In the scenario ahead, if the ground is rough and the coefficient of friction is 0.2.
Calculate: (1) the change of kinetic energy when the box pass through x = 5m.
(2) The velocity of the box at x = 5m.