The Ariane 6 rocket will be used to launch European satellites into space. It has a mass of 830000 kg and is carrying a satellite with a mass of 9000 kg.
Initially, the rocket and satellite are orbiting at 690 m/s. After
releasing the satellite, the rocket is only moving 670 m/s. How
fast is the satellite moving?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.

How is the ideal mechanical advantage of a wheel and axle calculated?