A person is running on a track. Which of the following forces propels the runner forward?

Two objects are moving against each other with a velocity of 50 m/s and 30 m/s. Each of the objects has a mass of 40 kg and 35 kg respectively. What would be the final velocity of both objects after the collision?

Define 1 standard kg

Which statement about gravity is true? A. It depends on other forces like frictiont to work. B. It is described as a fundamental force and therefore does not depend on other forces. C. It depends on velocity.

Acceleration is best defined as the rate of change of what object?

What keeps the protons in an atomic nucleus from flying away from one another

What is the kinetic energy of a 2 kg snowball thrown through the air at 5 m/s?

A 5.00*105-kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. what is the force constant k of the spring

A moving object always has energy in its?

What is the volume of a box that is 12 cm long, 2 cm wide, and 3 cm high?

Suppose a child drives a bumper car head on into the side rail, which exerts a force of 4000 N on the car for 0.200 s. (a) What impulse is imparted by this force?