While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.

Something is thrown in the air and 5.35 seconds later it lands on something 2.1 meters from the ground. How fast was it thrown up?

During spring tide, the sun, earth, and moon are in a straight line. This causes ...

A 20.0 kg mass moving at a velocity of + 3.0 m/s is stopped by a constant force of 15.0 n. how many seconds must the force act on the mass to stop it? html editor keyboard shortcuts

What is one situation where potential energy might be useful

Why are planets closer to the sun made of different substance than planets father from the sun?

How much work is done when a 4.0-newton box is carried horizontally a distance of 2.0 meters at a constant velocity?

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. If the force you apply has a magnitude of 86 N, what is the cart's acceleration? Assume negligible friction.

Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp. is 40deg below.

A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per second.

Why oil does not dissolve in water?