Question

1. A 2,190-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 4,730 m/s.
The radius of the circular orbit is 5.00 × 10⁶ m. Determine the magnitude of the gravitational force exerted on the satellite by the planet.

2. A certain string just breaks when it is under 57.00 N of tension. A boy uses this string to whirl a 0.3000 kg stone in a horizontal circle of radius 2.300 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?

3.A 0.300-kg ball attached to a string is rotating in a horizontal circle of radius 1.40 m. If the ball revolves 2 times every 2.30 seconds, what is the tension in the string? Give your answer in SI units.

4. A car enters a horizontal, curved roadbed of radius 57.0 m. The coefficient of static friction between the tires and the roadbed is 0.410. What is the maximum speed with which the car can safely negotiate the unbanked curve?

Answer 1