Some foundations are built using a piling machine that drives concrete piles deep into the ground. The machine lifts a heavy steel hammer and drops it onto each pile.The weight of the heavy steel hammer is 16 000 N16\,000\text{ N}16000 N.
Calculate the mass of the heavy steel hammer. [Take g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg]
The machine lifts the heavy steel hammer through a vertical distance of 0.85 m0.85\text{ m}0.85 m.Calculate the work done by the machine in lifting the hammer. Include the unit.
The heavy steel hammer is released from rest, falls onto the concrete pile, and drives it into the ground.Describe the energy transfers that occur from the moment the hammer is at its maximum height until after it impacts the pile. Your answer should refer to energy stores as well as transfers between energy stores.
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.