A lorry of mass 1350 kg accelerates uniformly from 9 km/h to reach a velocity of 45 km/h in 18 s. Determine (a) the acceleration of the lorry, (b) the uniform force needed to accelerate the lorry.

A robber with a mass of 61.91 kg runs away from his victim at a velocity of 7.911 m/s. A 119.1 kg cop running at 5.032 m/s from the opposite direction collides with and tackles the thief. As the cop is taking down the thief, what is their horizontal velocity?

A 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat, ready to dive, each with a 16-ft/s velocity relative to the boat. Assuming that the woman dives first, determine the work done by the woman and by the man as each dives from the boat. The work done by the woman is The work done by the man is ft-lb. ft-lb.

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