As shown below, a toy car is placed on a level table. A string connects the toy

Question

As shown below, a toy car is placed on a level table. A string connects the toy car with a hanging object over a pulley. The toy car's total mass (including the hook) is 5 kg, the static friction coefficient between the car and the table is s = 0.6, and the kinetic friction coefficient between the car and the table is k = 0.5. Ignore the mass of the string and and the mass of the pulley.

(a) What is the normal force exerted by the surface on the car?
N

(b) What is the minimum mass of the hanging object to make the car move?
kg

Explanation / Answer

a> 49N b> 3kg

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