Assignment:
Question 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.
Question 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?
Question 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).
Question 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?