A pulley system is used to lift a crate weighing 150 newtons straight up. If the force applied is 87 newtons and the ideal mechanical advantage of the pulley system is 2, what is the percentage efficiency of the pulley system?

If you place a charged object next to an uncharged object that is a conductor: a. There is an attractive force between the two objects. b. The force depends on whether the charge is positive or negative. c. There is no force between the two objects.

A person jogs 8 complete laps around a 400m track in a total time of 14.5 min. what is the average speed in m/s? what is the average velocity in m/s?

A motor does 5,000 joules of work in 20 seconds. What is the power of the motor?

Calculate the pOH of this solution. pH = 1.90 pOH = right answer get brainliest

Gravitational potential is related to a) what an object is made of b) an object's motion

Explain why Newton's first law of motion can be difficult to observe in moving objects?

No force is necessary to

A boat has a mass of 4040 kg. Its engines generate a drive force of 4660 N due west, while the wind exerts a force of 880 N due east and the water exerts a resistive force of 1400 N due east. Take west to be the positive direction.

Define the word projectile

Which is not a property of an electromagnetic wave? O It is made of magnetic fields It travels at the speed of light O It is made of electrical fields It carries energy only through matter