Is a moon of Jupiter, with a mass M = 8.90 times 10 kg, and a radius of 1820 km.

Question

Is a moon of Jupiter, with a mass M = 8.90 times 10 kg, and a radius of 1820 km. If NASA wants to put a satellite in a very low orbit around to, what orbital speed is needed? (The orbit's altitude is very small compared to low radius.) What period will this satellite have? A 145-kg football player applies a force of 520 N on the opposing 125-kg quarterback, while pushing him backwards 3.3 m at constant speed before being tackled. How much work did the tackler while pushing? A 2200-kg car is initially coasting at a speed of 24 m/s when it comes to a theta = 12.0 incline. It coasts without friction or air resistance, up the incline. How large is the initial kinetic energy of the car, in kJ? After it travels 75.0 m along the incline, how large is the gravitational potential energy of the car, in KJ? Take the zero of PE to be at the bottom of the incline. How fast is the car coasting now after it went 75.0 m along the incline? 850-kg car is set in motion on a level road by a spring with spring constant k = 2.40 times 10_6 N/m that been compressed 1.50 m. The car leaves the spring as it passes point A, and the driver slams on the at point B. The wheels lock and the car skids to a stop at point C, due to kinetic friction with coefficient mu k = 0.700. What is the initial mechanical energy of the system, with the spring compressed 1.50 m, before the car is released? What speed will the car have when it leaves the spring at point A? Over what distance (BC) will the car skid to a stop after the brakes are applied and the wheels

Explanation / Answer

here,

2)

mass of quaterback , m = 125 kg

force applied , F= 520 N

s = 3.3 m

the work done by the tackler , W = F * s

W = 520 * 3.3 J

W = 1716 J

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