Question

a- What is the maximum speed with which a 1200-kg car can round a turn of radius 90.0 m on a flat road if the coefficient of static friction between tires and road is 0.60?

Part b

If the jet is moving at a speed of 1140 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0 g's.

Express your answer to two significant figures and include the appropriate units.

r =

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Part c

Calculate the 75-kg pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same speed).

Express your answers using two significant figures separated by a comma.

FNbottom, FNtop =

  N

A coin is placed 16.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36.0 rpm (revolutions per minute) is reached, at which point the coin slides off.

Part d What is the coefficient of static friction between the coin and the turntable?

Answer 1