An industrial hoist is used to lift a cargo crate vertically from the ground floor to an elevated mezzanine storage platform.
- The mass of the cargo crate is 160 kg160\text{ kg}160 kg.
- The height from the ground floor to the mezzanine platform is 450 cm450\text{ cm}450 cm.
- The hoist lifts the crate to this height in 4.00 s4.00\text{ s}4.00 s.
- The gravitational field strength is g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg.
Calculate the useful power output of the hoist.
The total electrical power supplied to the motor of the hoist was actually greater than the useful power output calculated in Part 1. Suggest two reasons why.
Another hoist, with the same useful power output as the first hoist, took less than 4.00 s4.00\text{ s}4.00 s to lift a different crate up to the same mezzanine platform.
What conclusion can be made about the mass of this second crate?
- The second crate's mass was greater than the first crate's mass.
- The second crate's mass was lower than the first crate's mass.
- The second crate's mass was the same as the first crate's mass.
Energy changes in a system, and the ways energy is stored before and after such changes Questions
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.