How much force is needed to stop a 80-kg football player if he decelerates at 5 m/s2

If a plane was flying at a speed of 400 km / hr and 2 min later has slowed to 100 km/hr to land what is the acceleration

A 32.0 kg girl is in an elevator accelerating downward at -0.850 mls. How much normal force is acting on her? (Unit = N)

Whats the mass of an atom that has 4 protons, 4 neutrons, and 4 electrons

During each heartbeat, about 80 g of blood is pumped into the aorta in approximately 0.2 s. During this time, the blood is accelerated from rest to about 1 m/s. Part A) What is the average force on the blood during this time? A. 0.08 NB. 0.4 NC.

A water break at the entrance to a harbor consists of a rock barrier with a 50.0-m-wide opening. Ocean waves of 20.0-m wavelength approach the opening straight on.

Which of these describes how heat is transferred by radiation? A.) Warm air rises and takes heat with it; eventually it cools and sinks. B.) Sunlight travels through space without the aid of fluids or solids. C.

A body is moving with a velocity of 12m/s and it comes to rest in 2 minutes, what was the acceleration?

How can you find magnitude of velocity from a displacement time graph of an object?

Consider two rocks with masses of 1 and ten kilograms. What is the relation between their inertia's? Between their masses? Between their weights on earth?

If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration?