If you were on the moon, and you were trying to move a 20-lb bowling ball and a 3-foot cube of styrofoam, which item would take more work to move? why? a. the bowling ball; it is a harder object b. the styrofoam; it is larger c. the bowling ball; it has greater mass anywhere d. the styrofoam; it weighs more on the moon

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Positrons are spontaneously emitted from the nuclei of

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created