a) A container of petrol on a set of scales is used to measure the rate at which fuel is used by an engine under test. In one test the weight measured by the scales decreases by 25.0 N in 1 hour. (Assume the specific gravity of petrol is 0.720 and g is 9.81 m/s^2)
What is the rate (in L/s) of fuel used by the engine in this test
b) The undercarriage for an aircraft uses two springs between each wheel and the aircraft fueselage to cuhion the landing of the aircraft. There are two sprung wheels and the mass of the aircraft is 5000kg
Assuming a worst case scenario of a 0.20m drop of the full mass of the aircraft, what is the expected compression (in metres) of the 4 springs, if the spring constant K = 4000/Ncm
(Assume g is 9.81 m/s^2)
c) A person of mass 80kg places all their weight on the pedal of a foot operated hydraulic jack. The diameter of the hydraulic cylinder under foot pedal is 4cm and the diameter of the jack cyclinder is 9cm (Assume g is 9.81 m/s^2)
What maximum force can this person apply with this jack. Show your working