1) A roller-coaster car has a mass of 910 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 21 m, its speed is not changing.
a) What are the magnitude and direction of the force of the track on the car at the top of the hill if the car's speed is 11 m/s?
b) What are the magnitude and direction of the force of the track on the car at the top of the hill if the car's speed is 16 m/s?
a) What are the magnitude and direction of the force of the track on the car at the top of the hill if the car's speed is 11 m/s?
b) What are the magnitude and direction of the force of the track on the car at the top of the hill if the car's speed is 16 m/s?
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a) Centripetal force; the force that acts on an object that moves in a circle (even if it doesn't move in a full circle)
=((mass)(velocity^2))/(radius)
=((910kg)(11m/s^2))/(21m)
b) do the same process as in a except change 11 to 16
=((mass)(velocity^2))/(radius)
=((910kg)(11m/s^2))/(21m)
b) do the same process as in a except change 11 to 16