You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has what energy, kinetic or potential

Why isn't solar energy usually the only power source for a region

A bicycle rider travels 50.0 km in 2.5 hours what is te bicyclist average speed

Two negative charges that are both - 0.3C push each other apart with a force of 19.2 N. How far apart are the two charges?

A diffraction grating produces a first-order maximum at an angle of 10 degree. What is the angle of the third order maximum?

If an object is accelerating, the forces acting on it must be ___.

You slide a box of books at constant speed up a 30° ramp, applying a force of 200 n directed up the slope. the coefficient of sliding friction is 0.18.

Two trains leave the same station at the same time. The first train travels north at 60 mph. The second train travels west at 45 mph. Find how fast the distance between the trains is changing two hours after the trains have left.

If the room radius is 4.5 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out, what is the minimum coefficient of static friction so that the people will not slip down?

Energy of motion is known as what energy

While a constant total force of 17 n is exerted on a cart, the cart's acceleration is 5 m/s2. find the mass of the cart?