Homework Help: Physics

Posted by Kristina on Wednesday, March 14, 2012 at 4:03pm.

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps and it is obviously desirable that this not be too difficult. The engineer has done a survey and found that almost no one complains if the force directed up the ramp is no more than 20 N. Ignoring friction, at what maximum angle should the ramps be built, assuming a full 26 kg grocery cart?

Physics - bobpursley, Wednesday, March 14, 2012 at 5:31pm
ignorning friction? I wonder if the engineer has ever pushed a loaded grocery cart.

weight down ramp=mg*sinTheta=26*9.8SinTheta

set weight down = 20N max, solve for theta
Physics - Kristina, Thursday, March 15, 2012 at 12:54am
how am i suppose to know what theta is?!?

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