You input 75 J of work with a wedge. If the wedge does 65 J of useful work, what if the efficiency of the wedge?

6. Your friend is going 30 mph, when she slams on the brakes. If you are not wearing a safety belt. Which way does your body move? How fast will you be going when you slam into the windshield? Explain why you move this way in terms your inertia.

A 9.4 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.

How does increasing the number of charges affect the electric field strength for a given distance?

A disk of radius 2.02 cm and mass 1 kg is pulled by a string wrapped around its circumference with a constant force of 0.59 newtons. What is its angular acceleration to three decimal places?

An astronaut weighs 104N on the moon and the strength of gravity is 1.16N/kg What is her mass on the moon What is weight on Earth? (g=10N/kg) What would she weigh on Mars? g=3.7N/kg) Also, I need to show work for all these ...

To remove 700 j of heat from a refrigerator, the compressor in the refrigerator does 500 j of work. How much heat is released into the surrounding room

The elements least likely to form bonds are found in group__ a) 15 b) 16 c) 17 d) 18

F a metal ball suspended by a rod is at rest, which force is responsible for balancing the force due to gravity?

If the mass of a material is 48 grams and the volume of the material is 8 cm^3, what would the density of the material be?

Your family is moving to a new house. While lifting the box 1.5 m straight up you exerted a force of 200 N for 1 second. How much work is required?