The radius of the satellite’s orbit around the center of the Earth is r = 17 2 R , where R is the radius of the Earth. Hint: You may find it useful to take into account that the gravitational force is a conservative force. Hint: The universal gravitational force law is F~ = G M m r 2 ˆr . Earth R Satellite 17 2 R Caution: Neglect the rotational kinetic energy due to the Earth’s rotation. Find the energy required to launch a satellite from Earth into the circular orbit at the specified radius r = 17 2 R.

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?