A student practicing for a cross country meet runs 250 m in 30 s. What is her average speed?

1. An electric current of 0.028 A flows through a vacuum tube. What is a) the amount of charge b) the number of electrons passing through the tube in 75 s?

Which simple machine belongs to the inclined plane family

Define rotational speed? - short answer

Term for an atom whose electrons have the lowest possible energies

A cyclist turns a corner with a radius of 37 m at a speed of 22 m/s. What's the cyclist acceleration? If the cyclist and cycle have a combined mass of 90 kg, what is the force causing them to turn?

A hot-air balloon is 150 feet above the ground when a motorcycle passes directly beneath it (traveling in a straight line on a horizontal road). The motorcycle is traveling at 40 mph.

When is a body said to be at rest

What should i put on a greeting card for the birth of quartzite

The NET force on a rock that weighs 2 N when you hold it at rest above your head is?

A 1210-kg vehicle is moving along a horizontal surface with a speed of 28.3 m/s. What work (in J) must be done by the brakes to bring this car to rest in 4.58 seconds