A person with mass 65 kg, standing still, throws an object at 4 m/s. If the

recoil velocity of the person is 3.5 m/s, what is the mass of the object?

Assume the surface to be frictionless.

A train is moving at a constant speed on a surface inclined upward at 15.0° with the horizontal and travels 300 meters in 5 seconds. Calculate the horizontal velocity of the train at the end of 3 seconds.

A pair of electrically charged objects attract each other with a force of 4 N when they are a distance of 3 m apart. If their charges stay the same, then what will be the attractive force between them when they are 6 m apart

A raft with a mass of 180 kg carries two swimmers having masses of 50 kg and 80 kg. The raft is initially at rest. The swimmers dive off opposite ends of the raft at the same time, each with a speed of 3 m/s.

Which two statements about an electric motor are true? a. It converts motion energy to electric energy. b. It depends on the relative motion of a magnet and a current-carrying wire. c. It depends on a rotating magnet to create a magnetic field. d.

When students work in a chemistry lab, the location of which items would be the most important for each student to know?

What is the particle that an atom can lose or gain in order to form a charged ion

If you have 0.306 m3 of water at 25.0°C and add 0.102 m3 of water at 95.0℃, what is the final temperature of the mixture? Use 1000 kg/m3 as the density of water at any temperature. Number O Previous ⓧ Give Up & View Solution.

If b is the amplitude of the magnetic field vector, find the complete expression for the magnetic field vector b⃗ of the wave.

An electron and a proton are separated by a distance of 1 m. What happens to the size of the force on the first electron if a second electron is placed next to the proton?

Airbags will deploy no matter from what angle your car is hit.