1. If a car goes around a curve at half the speed, the centripetal force on the car is...
a.) twice as big.
b.) four times as big.
c.) half as big.
d.) one-fourth as big.

2. What is the gravitational force between two trucks, each with a mass of 2.0 x 10^4 kg, that are 2.0 m apart?

3. The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled? (G=6.673 x 10^-11 Nxm^2/kg^2).

4. A car goes around a curve of radius r at a constant speed v. What is the direction of the net force on the car?

Please show your work, the formula(s) used and the answer.

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While the solutions are given below in ascii text. I also attached two files with the equations typed more nicely, and an illustration regarding problem #4.

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... 2. the tension in the rope towards the center of the circular path. The result of these forces is that the component of the resultant force, tangential to ...

... directed towards the centre of the circular path, hence ... must also act towards the centre (centripetal force). ... As per Newton's third law, the forces of action ...

... on the turntable does the penny require the largest centripetal force to remain in place? Give your reasoning. Problems. (Uniform Circular Motion & Centripetal ...

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