you hold a metal block of mass 40 kg above your head at a height of 2 m how much work is done bu gravity if you let the block fall to the ground

Mai jogs 800 m north and then turns and jogs 200 m back to the south. What is her velocity if it takes her 400 seconds? A. 2.5 m/s north B. 2.5 m/s south C. 1.5 m/s south D. 1.5 m/s north

A 500-kg roller coaster car travels with some initial velocity along a track that is 5 m above the ground. The car goes down a small hill and then coasts back up a higher hill. The second hill is 12 m above the ground.

Which substance has the most thermal energy and will have the most heat flow from it? a stovetop burner on medium (200°C) a nuclear reactor core (1000°C) the human body (36°C) air at room temperature (32°C)

The distance from the inner core to the surface of the earth is about 5,200 kilometers. the large amount of material surrounding the inner core places tremendous pressure on it.

Match the terms to their definition. Tuck, pike, or stretch are different 1. anorexia body positions in this gymnastics event. Scores are awarded on execution and difficulty 2.

Make a table table that shows the causes and effects of local winds and monsoons

A stone is dropped from the roof of a high building. A second stone is dropped 1.00 s later. How far apart are the stones when the second one has reached a speed of 14.0 m/s?

1. While skiing, Sam flies down a hill and hits a jump. He has a mass of 75 kg, and he leaves the jump at 18 m/s. What is his momentum as he leaves the jump?

After traveling for 6.0 seconds, a runner reaches 10m/s. What is the runner's acceleration?

A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over the edge of a building 120 ft high. how much work is done (in ft-lb) in pulling half the rope to the top of the building?