A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why this occurred?

A box is initially at rest on a frictionless inclined plane

The wavelength of a beam of light is 1.20 cm. what is the energy of one photon of this radiation?

How is work related to force and displacement?

Saturn's moon Mimas has an orbital period of 82,800 s at a distance of 1.87x10^8m from Saturn. Using m central m = (4n^2d^3/GT^2) 1 determine Saturn's mass. Determine Saturn's mass by rearranging Newton's version of Kepler's Third Law.

A sled with a mass 53.0 kg is pulled along flat, snow-covered ground. the static friction coefficient is 0.30, and the kinetic friction coefficient is 0.10. (a) what does the sled weigh? 519.

What is the principles of electric motor

A tow truck has a weight of 10,350 N. What is the mass of the tow truck?

Calculate the momentum of 5.07 kg egg that is dropped from a roof and falls 2 seconds before hitting the ground.

Make a prediction based on your understanding of the cause-and-effect relationship between environment and trait: what happens when an environmental change is too extreme for the population of organisms to adapt?

You are holding the axle of a bicycle wheel with radius 35.0 cm and mass 1.00 kg. You get the wheel spinning at a rate of 75.0 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 1.