Calculate the kinetic energy of a car with a mass of 500kg traveling at a velocity of 10m/s^2 north. A) 2,500j B) 25,000j C) 50,000j D) 100j

Suppose that a person riding on the top of a freight car shines a searchlight beam in the direction in which the train is traveling. How does the speed of the light beam relative to the ground compare to the speed of beam when the train is at rest?

A physics book rests upon a level table

Which material is the best choice for the head of a hammer? a thermoset a thermoplastic a metal wood

A stone is thrown vertically upward with a speed of 18.0 m/s. How fast is it moving when it reaches a height of 11.0m? How long does it take to reach the height?

What is the name for all the electromagnetic waves that exist

A dog searching for a bone walks 3.5 m south, then 8.2 m at an angle of 30.° north of east, and finally 15 m west. What was the dog's resultant displacement.

Which of the following does not describe a scientific theory?

A radiographer in a hospital is preparing a sample of technetium-99. Name two protective measures she should be to ensure she is safe from the radiation?

Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the machine?

Una locomotiva traina un solo vagone, che ha la sua stessa massa, con la forza di 4000 N. Alla locomotiva vengono aggiunti altri quattro vagoni identici al primo: quale forza deve sviluppare adesso la locomotiva affinché il convoglio mantenga la