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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 -

    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 -

    how am i suppose to know what theta is?!?

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