A box is kept on a horizontal conveyor belt the belt starts...

A box is kept on a horizontal conveyor belt. The belt starts accelerating towards the left, and the box moves with it without sliding on the belt. Is there any friction force exerted by the belt on the box? If so, what is the direction of the friction force? Explain your answers.

A 12 kg crate is placed on a horizontal conveyor belt. The materials are such that the friction coefficients μs = 0.50 and μk = 0.30. a) (4 pts) Assume the conveyer belt runs to the right at constant speed. Below draw a picture showing the situation and to the right draw a complete free-body diagram. b) (3pts) Draw a free-body diagram of the crate while the conveyer belt is speeding up to the right. c) (4pts) What is the maximum acceleration the belt can have without the crate slipping? d) (2pts) If acceleration of the belt exceeds the value determined in part C, what is the acceleration of the crate? 10) (2 pts) In class we discussed that static friction can sometimes point in the same direction as the motion of an object. Describe an example where kinetic friction points in the same direction as the motion of the object?

Madhur L.

Question

A box is kept on a horizontal conveyor belt. The belt starts accelerating towards the left, and the box moves with it without sliding on the belt. Is there any friction force exerted by the belt on the box? If so, what is the direction of the friction force? Explain your answers.

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