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4. A uniform ladder of mass m = 40 kg and length / =10 m is leaned against a vertical wall. The foot of the

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4. A uniform ladder of mass m = 40 kg and length / =10 m is leaned against a vertical wall. The foot of the ladder is d=1.2 m from the bottom of the wall and does not move. (5 marks) (a) What is the force exerted by the wall on the ladder? (b) What is the normal force exerted by the floor on the ladder

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