A satelite is in geostationary orbit. How much energy is required to move it to a circular orbit where it orbits the Earth once in 8 days? You may express your answer in terms of the total energy of the initial geostationary orbit.

A car has a kinetic energy of 4.32 × 10° J when traveling at a speed of 23 m/s. What is its mass?

At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m. (a) If a particular payload has a mass of 15 kg, what is its potential energy relative to the bottom of the shaft? J(b) How fast will the payload be traveling when it reaches the bottom of the shaft? m/sConvert your answer to mph for a comparison to highway speeds. mph

A camera weighing 10 N falls from a small drone hovering 20m20moverhead and enters free fall. What is the gravitational potential energy change of the camera from the drone to the ground if you take a reference point of (a) the ground being zero gravitational potential energy? (b) The drone being zero gravitational potential energy? What is the gravitational potential energy of the camera (c) before it falls from the drone and (d) after the camera lands on the ground if the reference point of zero gravitational potential energy is taken to be a second person looking out of a building 30m30m from the ground?

A 977-kg satellite orbits the Earth at a constant altitude of 101-km. (a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 205 km? 892.8 How is the total energy of an object in circular orbit related to the potential energy? MJ (b) What is the change in the system's kinetic energy? 178 Is the satellite moving faster or slower when it's orbit is at a higher altitude? MJ (c) What is the change in the system's potential energy? MJ

A 15​-gram ​[g] rubber ball is released from a height of 8 meters​ [m] above a flat surface on the moon. Gravitational acceleration on the moon is 1.62meters per second squared ​[m/s2​]. Assume that no energy is lost from frictional drag. What is the​ velocity, in units of meters per second​ [m/s], of the rubber ball the instant before it strikes the flat​ surface?

A 6.50 kg ball hangs from the end of a 1.75 m rope. The ball is pulled back until the rope makes a 45 degrees angle with the vertical. What is the gravitational potential energy of the system? 32.49 J 52 J 78.82 J 111.48 J 16. A 16500 kg car travels at a speed of 12.5 m/s. What is its kinetic energy? 130000 J 1289062.50 J 1003125 J 206250 J 16000 J

Consider a satellite in a circular orbit above Earth’s surface. In Chapter we will learn that the force of gravity changes only the direction of motion of a satellite in circular motion (and keeps it in a circle); it does NOT change the satellite’s speed. Work done on the satellite by the gravitational force is zero. What is your explanation?

A cat, of mass 6 kg, is sitting in a child's swing seat that is hanging from a high bar via thin chains of length 3.5 m. Initially, the chains hang straight down, and the swing seat is 1 m above the ground. Now the swing seat is pulled over, so that the chains make an angle of 61 degrees with respect to the downward direction. How much more gravitational potential energy U (in J) does the Earth-cat system have then, than when the chains hang straight down?

The 50 kg block slides down the 2m high ramp. At some point, the block is .5 meters above the ground. What is its kinetic energy and potential energy of the block at that point? Keep in mind, the sum of the potential energy and kinetic energy has to be a constant value at any point on the ramp. We are ignoring any frictional effects.