Astone is held at a height h above the ground. a second stone with four times the mass of the first one is held at the same height. the gravitational potential energy of the second stone compared to that of the first stone is a) one-fourth as much b) one-half as much c) twice as much d) four times as much e) the same.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

What equation is used to calculate the weight of an object on a plant ?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?