Physics Answers

What are the magnitude and direction of the electric field that will balance the

weight of (a) an electron and (b) a proton?

The two ski players are about to slide down from a height of the same measurement. With the given values of their masses, describe the gravitational potential energy of the two players.

player 1 = 60 kg

player 2 = 50 kg

A boy of mass 40kg runs up a flight of 30steps each step is 150mm in 6s.Find the average power developed by the boy.(g=10ms²)

Calculate the gravitational potential energy of a system composed of a perfectly spherical planet with mass M and radius R and a rocket of mass m when the rocket is at the surface of the planet. Show your answer in equation form.

A car travels 25.0 km of a 50.0 km trip at an average speed of 40.0 kmh–1 . It travels the second half of its journey at an average speed of 80.0 kmh–1. A truck makes the same trip but spends half of its time at an average speed of 40.0 kmh–1 and the other half of its time at an average speed of 80.0 kmh–1. Which vehicle got there in the shortest period of time? Show your work

f the magnitude of the resultant force is to be 9kN directed along the

positive x axis, determine the magnitude of force T acting on the eyebolt

and its angle delta.

A chair of mass 12 kg is sitting on the horizontal floor, the floor is not frictionless. You push the chair with a force F=40N that is directed to an angle of 37° below the horizontal, and the chair slides along the floor. a.Draw a clearly labeled-body diagram for the chair. b.Use your diagram and Newton's law to calculate the normal force that the floor exerts on the chair

A man is marooned at rest on level frictionless ice. In desperation, he hurls his shoe to the right at 4.1m/s. If the man weighs 385 N and the shoe weighs 2.1N, the man moves to the left with a speed of...

Block A and B are moving toward each other. A has a mass of 2.6 kg and a velocity of 5.3m/s, while B has a mass of 6.7kg and a velocity of −7.6m/s. They suffer a completely inelastic collision. During the collision, how much kinetic energy is lost?

A 41.5-N puck is traveling at 4.7m/s. It strikes a 11.6-N puck, which is stationary. The two pucks stick together. Give the common final speed of the two.