Neglecting air resistance, when does a struck baseball accelerate downward at a rate of 9.8 m/s2?

2. Why does the potential energy decrease as the ball falls?

At night, the demand for electricty supplied by a fission nuclear reactor decrease. how is the fission nuclear reaction controlled to avoid overproduction of electricity

Using a simple machine, a student is able to lift a 500N weight by applying only 100N. What is the mechanical advantage of the simple machine? A) 0.2 B) 1 C) 5 D) 50000

Which structure reduces friction between joints?

An object is moving at a velocity of 23 m/s. It accelerates to a velocity of 85 m/s over a time of 8.3 s. What acceleration did it experience?

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite