How much force is needed to stop a 50 kg gymnast if he decelerates at 25 m/s^2

In net forces

Why does a liquid need a container and a solid doesn't?

What is the approximate potential energy of a 65 kg person standing on a step that is 0.15 m above the ground?

A student has a weight of 534 N. The student sits in a chair. When the student sits in a chair, how much force does the chair apply to the student?

Anna needs to move a box of paperback books across the room. If she applies a force of newtons to the box, what is the magnitude of the force exerted by the box on Anna?

A current of 1.53 a flows through a 63.5 resistor for 6.4 min. How much heat was generated by the resistor

Thermal energy from the Earth's core heats rock and creates magma. This hot magma then rises toward the Earth's surface, cools, and sinks back down toward the Earth's core. Which actions below occur during this process? (multiple answers) A.

A surface is bombarded by particles, each of mass small 'm', which have velocity normal to the surface. On average, n particles strike unit area of the surface each second and rebound elastically. What is the pressure on the surface? A. nmv B.

If an atom has twelve electrons, how many electrons are in the n=1 energy level? how many electrons are in the n=2 energy level? how many electrons are in the n=3 energy level?

Which object is largest? star galaxy globular cluster planet?

What if the population of rabbits decrease, what would happen with foxes and owls?