A weightlifter can lift 220lbs. (assume 1kg weighs 2.2lbs) If he lifts the weight 2m above the floor, how much work did he do?

Follow up: if the weightlifter lifts the weight 1.2 seconds, how much power does he generate?

How do Newton's 3 laws apply to an egg drop?

In newton's law of universal gravitation what does G represent

Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board 3.6 m long. Two playmates are already on either end. Boy A has a mass of 40 kg, and girl B a mass of 30 kg.

An airplane accelerates at 3 m/s2. The takeoff speed for this plane will be 65 m/s. How long does the plane accelerate?

What indicates a vector's size? a. direction b. magnitude c. slope d. speed

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away. A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?

Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.