Earth-Moon-Sun System — Unit test Answers

In the equation for the gravitational force between two objects, what does G represent?

An object is represented by the dot on the motion map.

The orbital period of a satellite is 2 × 106 s and its total radius is 2.5 × 1012 m. The tangential speed of the satellite is m/s. (Round to the nearest whole number, do not add any punctuation.)

What did Johannes Kepler contribute to the study of planets?

The pitcher on a softball team starts a windup to throw a pitch, as shown.Note: In softball, the ball is pitched underhand in a circular motion in the direction of the arrow.

Following an inelastic collision, what can kinetic energy be converted into? Check all that apply.heatimpulsemomentumpotential energysound

The image shown is an illustration of Kepler’s second law.

Hakeem wants to explain why only one side of the moon is visible from Earth. Which comparison would provide the best support?

A bicycle tire has a radius of 0.23 m. The tire spins at a constant speed with a centripetal acceleration of 42 m/s2.

Cecelia dropped a ball from a height of 2 m. The ball fell in a straight path down to the ground.

A cyclist rides at a constant speed of 4.5 m/s around a curve. If the centripetal acceleration is 29 m/s2, what is the radius of the curve?

A large truck is moving at 22.0 m/s. If its momentum is 125,000 kg • , what is the truck's mass?

Which statement is supported by Kepler’s laws?

A child on a spinning ride at a playground has a centripetal acceleration of 0.80 m/s2. The child completes a full circle every 4.2 s.

In the equation for centripetal force, which expression represents the centripetal acceleration of the object?