A man pushes down on a lever with 45 N and the lever moves 1.5 meters. The other end of the lever lifts a 87.6 N box. 4 meters. What is the efficiency of the lever?

A car with an initial velocity of 16.0 meter per second east slows uniformly to 6.0 meters per second east in 4.0 seconds. what is the acceleration of the car during this 4.0 second interval.

What is the velocity of a wave with a frequency of 6 Hz and a wavelength of 2m?

Coulomb's law states that the attraction between two unlike charged bodies varies directly as the distance between them. true false

What is the potential energy of a 1-kilogram ball is thrown into the air with an initial velocity of 30m/sec?

The moon orbits a. Earth. c. Saturn. b. the sun. d. Mercury.

My Notes A basketball rolls across a classroom floor without slipping, with its center of mass moving at a certain speed. A block of ice of the same mass is set sliding across the floor with the same speed along a parallel line.

How does sound travel through waves?

Solve for real t: - 25=20t-5t^2

Contrast balanced and unbalanced forces.

A wave will travel only as long as it has energy