In real machines, efficiency is always

What are advantage of frictional force ?

You want to use a lever to lift a 2000 N rock. The maximum force you can exert is 500 N. Draw a lever to lift the rock. Label the input force, output force, fulcrum, input arm, and output arm. Specify measurements for the input and output arms.

If a skater pushes on the ice, exerting a force on the ice, then the ice pushes the skater, exerting a force on the skater, this is an example of Newton's law. A. 1st B. 2nd C. 3rd

A satellite views the earth at an angle of 20°. What is the arc measure

A car is traveling at a speed of 39.2m/s on an interstate highway where the speed limit is 65.0mi/h. Is the driver exceeding the speed limit? YesNo Justify your answer.

Cells are known as the foundation of all life. How have these small structures changed our planet?

What does it mean to dissolve something

Why is a neutral object attracted to a charged object?

The international space station revolves around earths surface. which of the following statement s is true? a. it has no energy because it is stationary b. it has potential energy, but does not have kinetic energy c.

A sports car moving at constant speed travels 115m in 5.3 s. If it then brakes and comes to a stop in 4.0 s, what is it's acceleration? Express the answer in terms of g's, where g = 9.