An automated stacker crane in a smart distribution centre lifts a heavy pallet of components onto a high storage rack.
An engineer needs to measure the vertical height of the storage rack to verify the crane's limits. Suggest a suitable measuring instrument they should use.
The height of the storage rack is 6.2 m6.2\text{ m}6.2 m. The total mass of the pallet and the components is 125 kg125\text{ kg}125 kg. gravitational field strength=9.8 N/kg\text{gravitational field strength} = 9.8\text{ N/kg}gravitational field strength=9.8 N/kg
Calculate the increase in gravitational potential energy of the pallet. Use the equation: gravitational potential energy=mass×gravitational field strength×height\text{gravitational potential energy} = \text{mass} \times \text{gravitational field strength} \times \text{height}gravitational potential energy=mass×gravitational field strength×height
During the lift, the electric motor on the crane does 9100 J9100\text{ J}9100 J of work. The time it took to lift the pallet was 6.50 s6.50\text{ s}6.50 s.
Calculate the power of the motor. Use the equation: power=work donetime\text{power} = \frac{\text{work done}}{\text{time}}power=timework done
Once at the level of the rack, the pallet is transferred horizontally onto the shelf with a speed of 1.8 m/s1.8\text{ m/s}1.8 m/s.
Calculate the kinetic energy of the pallet. Use the equation: kinetic energy=0.5×mass×(speed)2\text{kinetic energy} = 0.5 \times \text{mass} \times (\text{speed})^2kinetic energy=0.5×mass×(speed)2
Practise AQA GCSE Physics Energy changes in a system, and the ways energy is stored before and after such changes with exam-style questions for Foundation and Higher tier. 64 questions covering Energy stores and systems, Changes in energy, Energy changes in systems, and Power, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.