A pulley is used to lift a heavy mass from the floor to a platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

A ball is thrown up into the air. Explain what happens to its potential and kinetic energies as it moves up and then back down

Draw a distance over time graph of a dog that is tied to a 4 foot rope and travels in 1 complete circle

If you go to the beach on a hot summer day, the temperature of the sand is much higher than the temperature of the water.

What percentage of the earth's surface is covered in water

Compare and contrast xylem and phloem.

Explain how the energy of a rubber ball is transformed as it rolls down a ramp.

Which type of friction acts on an object that is not moving? static friction fluid friction sliding friction rolling friction

A substance maintaining a uniform appearance throughout

How much work will it take to lift a 2-kg pair of hiking boots 2 meters off the ground and onto a shelf in your closet? O A. 2.45 J OB. 4J C. 39.2 J D. 20 J

Two cars collide on the parkway. The drivers are following too closely and the driver in the front slows because of traffic to a velocity of 20.0m/s and the driver behind is still moving at 30.