A 500g object falls off a cliff and losers 100 J from its gravitational potential energy store. if the gravitational field strength g=9.8N/kg, how high is the cliff?

A 6.30 kg piece of solid copper metal at an initial temperature T is placed with 2.00 kg of ice that is initially at - 16.0 ∘C. The ice is in an insulated container of negligible mass and no heat is exchanged with the surroundings.

How did astronomers use technology to identify characteristics of the Crab Nebula?

A bungee jumper falls 97.2 feet before bouncing back up at the end of his bungee cord. Then he falls 64.8 feet before bouncing up again. On his third descent, he falls 43.2 feet before going back up.

A mass of 0.4 kg hangs motionless from a vertical spring whose length is 0.76 m and whose unstretched length is 0.41 m. Next the mass is pulled down to where the spring has a length of 1.01 m and given an initial speed upwards of 1.6 m/s.

Two rocks are thrown horizontally at the same time and from the same height. If the initial speeds of rocks A and B are 10 m/s and 15 m/s, respectively, which statement below is true?

Which of these forces could speed up a baseball? A) Applied and Frictional forces B) Applied and Gravitational forces C) Frictional and Gravitational forces

When you are travelling downhill on a roller coaster, you experience a light feeling in your stomach. why?

Sound waves transport: a. only matter b. only energy c. both matter and energy d. matter when passing through a medium and energy passing through vaccum

What's the number 9?

A car travels along a straight line at a constant speed of 60.0 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entire trip is 30.0 mi/h.