A car is moving at high speed along a highway when the driver makes an emergency braking. The wheels become locked (stop rolling
), and the resulting skid marks are d = 33 meters long. The coefficient of kinetic friction between tires and road is μ = 0.55 and the acceleration was constant during braking. Write an equation for the speed of the car when its wheels became locked using variables from the problem statement. Use g for acceleration due to gravity.
1 answer:
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Explanation:
A student solving for the acceleration of an object has applied appropriate physics principles and obtained the expression :
Where
m = 7 kg
So, the correct step for obtaining a common denominator for the two fractions in the expression in solving for a is (a) and the value of a is :
Hence, the correct option is (a).