A number of buildings rest on long, strong metal rods that are driven far down into the ground. A machine lets a very heavy hammer drop onto each rod so that it is forced into the ground, as shown in Fig. 2.1. The heavy hammer weighs 25 000 N.
(a)[3]
Calculate the mass of this heavy hammer.
(b)[4]
Calculate the work done by the machine when it lifts the heavy hammer. Include the unit.
(c)[2]
Describe the energy transfers from the heavy hammer to the metal rod. Your response should mention energy stores and the transfers between those stores.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “W divided by g (25 000 ÷ 9.8)” …