Physics, 02.11.2019 15:31, bellad05

Pls answer quickly this question a 100 kg box on a platform 2m high is to be lowered down a plane of length 4m the coefficient of friction is 0.45. what force needs to be applied up the plane to prevent the box from falling down the plane

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Pls answer quickly this question a 100 kg box on a platform 2m high is to be lowered down a plane of...