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Praxis II General Science

Category - Physics

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Ed’s car tires have a coefficient of friction of 0.45 against the road. If his car weighs, 1100 kg, how much force would be required to cause his car’s tires to slip and slide?

2780 N
4850 N
5110 N
5345 N
6005 N

Explanation

Answer: B - The force needed to cause the car to slide is 4850. The friction force is F = μ*m*a, where a is the acceleration of gravity, m is the mass, and mu (μ) is the friction coefficient. Thus, F = 0.45*1100*9.8 = 4851, or answer B.

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