A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

Which graph represents what happens to F_g between two objects if the distance between them increases?

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. How much stronger is the planet’s gravity on satellite a (compared to satellite b)?

The Earth has a radius of approximately 6000 km. A 600 N astronaut, orbiting the Earth at an altitude of 12000 km above the surface, has a weight of approximately:

A satellite of mass m is in a circular orbit about the Earth (mass = M) at a height h above the surface, where h=R, the radius of the Earth. What velocity should this satellite have in order to maintain its orbit?

An exoplanet has half the radius of the Earth but the same mass. What is the acceleration due to gravity at the surface of this planet as a function of g?

Let v represent the escape velocity from the surface of the Earth. Saturn, with a radius 10 times of Earth and a mass 100 times Earth's would have an escape velocity of about:

A 1.2 kg mass on the end of a string is swung in a vertical circle of radius 0.85 m. If the speed of the mass at the top of the circle is 3.6 m/s, what is the tension in the string at this location?

A bus of weight W is moving at a constant speed over a hill and through a dip, both with the same radius of curvature. When the bus is at the top of the hill, the road exerts a normal force equal to 3/4 W. What is the normal force when the bus is at the bottom of the dip?

This data is an example of what technique to determine the presence of exoplanets?

What is the orbital period of Kepler 7b?

Wha type of tide would this arrangement of earth-moon-sun create?