A car is traveling 11.4 m/s. A truck having four times the mass of the car is traveling at 22.7 m/s. How many times greater is the trucks kinetic energy compared to the cars kinetic energy?

If a person's weight is W on the surface of the earth, calculate what it would be, in terms of W, at the surface of (a) the moon; (b) Mars; (c) Jupiter.

What is meant by the statement, "a thermometer measures its own temperature"?

A clock has a second hand whose tip rubs against the inside of the glass cover. If the frictional force between the glass cover and the tip of the second hand is 0.0020? and the length of the hand is 8.

Which statement explains why a short eyeball causes farsighted

Given a wire with a cross section of. 45cm^2, a length of 3cm, and an internal resistance of 3 ohms, show your 5 steps to solve for the resistivity of the wire

Objects can be accelerating and traveling at constant velocity at the same time. True or False

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.