Two Earth satellites, A and B, each of mass m = 880 kg , are launched into circular orbits around the Earth's center. Satellite A orbits at an altitude of 4400 km , and satellite B orbits at an altitude of 13600 km Part A What are the potential energies of the two satellites?

4. An object of mass m makes a loop-the-loop as shown. When it is upside down at point A, the normal force is found to be 2mg. a) What is the speed of the object at point A in terms of g and R? b) What is the normal force at point B, neglecting any friction of air resistance? Put your answer in terms of m and g. A B

2. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satelliteA) is zeroB) is greater than zero.C) is less than zero.D) would be different if the masses of the earth and satellite were different.E) can’t be determined without a calculator and some data.i. Prove your answer by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full revolution.) ii. Prove your answer by talking about the satellite’s kinetic energy, ∆?� ***also please do it i,ii and write a process detail.

A rocket with mass 7.00×103 kgkg is in a circular orbit of radius 7.50×106 mm around the earth. The rocket's engines fire for a period of time to increase that radius to 8.80×106 mm, with the orbit again circular.     Part A What is the change in the rocket's kinetic energy? Does the kinetic energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the kinetic energy increases and negative value if the kinetic energy decreases.       ΔKΔK = nothingnothing   SubmitRequest Answer Part B What is the change in the rocket's gravitational potential energy? Does the potential energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the gravitational potential energy increases and negative value if the gravitational potential energy decreases.       ΔUΔU = nothingnothing   SubmitRequest Answer Part C How much work…

As shown in the figure below, a small box is released from rest at point A along the horizontal diameter on the inside of a frictionless, hemispherical bowl. The box has a mass m = 295 g and the bowl has a radius R = 33.0 cm. 2R/3 (a) Calculate the gravitational potential energy of the box-Earth system (in J) when the box is at point A relative to point B. J (b) Calculate the kinetic energy of the box (in J) at point B. (c) Calculate its speed (in m/s) at point B. m/s (d) Calculate its kinetic energy (in J) when the box is at point C. (e) Calculate the potential energy (in J) when the box is at point C.

Two 0.56-kg basketballs, each with a radius of 15 cm, are just touching. Part A How much energy is required to change the separation between the centers of the basketballs to 1.0 m ? (Ignore any other gravitational interactions.) Express your answer in joules. ► View Available Hint(s) AU = Submit Part B AU = VE ΑΣΦ Submit How much energy is required to change the separation between the centers of the basketballs to 14 m ? (Ignore any other gravitational interactions.) Express your answer in joules. ► View Available Hint(s) B VE ΑΣΦ ? X ? J