It takes 86 joules of energy to raise a box 2 meters using the pulley setup shown above. Without the pulley, the box can be raised 2 meters using only 82 joules of energy. What could explain this 4-joule difference?

A mass of 2000 kg is raised 5.0 m in 10 seconds. What is the power output in horsepower to raise the object? 13 7.5 x 10.^6

A planet has a mass of about 6.4 x 1023 kg, and its moon has a mass of about 9.6 x 1015 kg. if the magnitude of the gravitational force between the two bodies is 4.6 x 1015 n, how far apart are the planet and its moon? a. 9.4 x 106 c. 4.6 x 109 b. 2.

A car having an initial speed of 16 meters per second is uniformly brought to rest in 4.0 seconds. How far does the car travel during this 4.0 second interval

9. A force does 50) of work on an object at rest with a mass of 4 kg. Which of the following is the final velocity of the object? 25 m/s 5 m/s 3.5 m/s

An astronaut is moving in space when a big explosion occurs about 50 meters behind him. How will the astronaut come to know about the explosion?

Describe accuracy, precision and best fit line.

Convert 255 cm to meters, millimeters, and kilometers

7.) A car starts from rest and accelerates uniformly at 1.7 m/s/s. How long will it take the car to reach a speed of 34 m/s? A 200 s B 58 s C 20 s D2 s

A wheelbarrow is an example of what type of lever

Why is it necessary to evaluate an experiment