The floor of a lorry is 2m high,a plank 5m long is use as an...

The floor of a lorry is 2m high,a plank 5m long is use as an incline plane to raise a load of 200N,if the efficiency of the machine is 70%.Calculate the effort needed to raise the load up the plane.?

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Answers (3)

isaaq
1 week ago
Follow the link below to access the answer.
https://myschool.ng/questions/view/academic-questions/128521
Newman
1 week ago
V.R. = 1/sin@ = distance moved by effort / distance moved by load = 5/2 = 2.5Efficiency = MA / VR x 100%50% = MA / 2.5 x 100%MA = 50 x 2.5 / 100 = 1.251.25 = load / effort = 200 / effortEffort = 200 / 1.25 = 160N
Aliyu
1 week ago
V.R. = 1/sin@ = distance moved by effort / distance moved by load = 5/2 = 2.5
Efficiency = MA / VR x 100%
50% = MA / 2.5 x 100%
MA = 50 x 2.5 / 100 = 1.25
1.25 = load / effort = 200 / effort
Effort = 200 / 1.25 = 160N
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