Elon Musk decides to launch a satellite that weights 300 kg to a height of 700km above the surface of the earth. What is the kinetic energy (you first have to find centripetal to stay in orbit, then kinetic)

A satellite is in orbit above a planet. Which of the following is TRUE? 1. The total energy of the satellite is positive 2. The kinetic energy and GPE of the satellite is negative 3. The kinetic energy and GPE of the satellite is positive 4.The total energy and GPE of the satellite is negative

I just need to know what is the Energy Conservation Equation.

14.) A hypothetical planet has a radius 2.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? Express your answer to two significant figures and include the appropriate units. gplanet= ____________ ______________   15.) A 1400-NN crate rests on the floor. a.) How much work is required to move it at constant speed 5.0 mm along the floor against a friction force of 330 NN . Express your answer to two significant figures and include the appropriate units. Wp= ____________ _____________ b.) How much work is required to move it at constant speed 5.0 mm vertically. Express your answer to two significant figures and include the appropriate units. Wp= _____________ ______________

I Review | Constants | Periodi Part B Consider an initial system of three charges shown in (Figure 1). An object with charge q4 = + 8.0 × 10¬8 C will be moved to position C from infinity (not shown in the figure). q1 = q2 = q3 = +10.0 × 10¬8 C. Determine the final electric potential energy of the system consisting of all four charges, with q4 at position C. Express your answer with the appropriate units, to two significant figures. µA ? - 3 Uaf = 2.1 • 10 J Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part C Figure 1 of 1 Determine the work done on the system by moving the charge q4 from infinity to point C. Express your answer with the appropriate units, to two significant figures. HA ? 20.0 cm W = Value Units 92 +-20.0 cm C 20.0 cm Submit Request Answer Part D 93

Question A3 State Newtons law of gravitation in equation form naming ALL terms in the equation. The gravi- tational potential energy of a mass m on the surface of a planet of radius R and mass M is given by the expression: GMm U = - R Derive an expression for the escape velocity vese for the given potential.

Describe your approach to calculating the velocity of a satellite in an orbit of radius R around the Earth. Select as many options as you think are appropriate. a. Use Newton's second law. O b. Use Kepler's second law. ☐ c. Use Newton's law of universal gravitation. d. Use Kepler's first law.

A roller coaster cart is moving over the top of a circular hill that has a diameter of 56 m. What is the fastest safe speed that the roller cart can go over the top of the hill? (that is, at what speed will the cart begin to lose contact with the track?). Assume a coefficient of friction of 0.7.

Calculate the kinetic energy of a 2.1 * 10 ^ 3 kg satellite moving at a speed of 8.5 (km)/s. Round your answer to 2 significant digits.

A mother pushes her child on a swing so that his speed is 9.7 m/s at the lowest point of his path. The swing is attached to a point 2.05 m above the child’s center of mass when the swing is motionless. What is the centripetal acceleration of the child at the low point in m/s2? What is the magnitude of the force that the child exerts on the seat at the lowest point if his mass is 19.5 kg in N?