joshsimpson26
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- Jun 27, 2018
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Attempted this question multiple times but still cant work out P4.1
P4.1 A motor vehicle of mass 800 kg stands on an incline whose gradient is 1 in 10. The handbrake is released, and the vehicle runs down the incline.
If the frictional resistance to motion is 40 N, find the speed in km/hr of the vehicle after running 200 m down the incline.
P4.2 The velocity of a mass 16 kg is increased from 5 m/sec to 20 m/sec in 12 seconds.
Calculate the power required to produce the change in kinetic energy of the body.
P4.3 Calculate the amount of work done and the power required by a hydraulic hoist, in lifting a vehicle of mass 1500 kg to a height of 2 m in 45 seconds.
Diagram and question is attached
P4.1 A motor vehicle of mass 800 kg stands on an incline whose gradient is 1 in 10. The handbrake is released, and the vehicle runs down the incline.
If the frictional resistance to motion is 40 N, find the speed in km/hr of the vehicle after running 200 m down the incline.
P4.2 The velocity of a mass 16 kg is increased from 5 m/sec to 20 m/sec in 12 seconds.
Calculate the power required to produce the change in kinetic energy of the body.
P4.3 Calculate the amount of work done and the power required by a hydraulic hoist, in lifting a vehicle of mass 1500 kg to a height of 2 m in 45 seconds.
Diagram and question is attached
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