When riding a roller coaster, you go up and down many hills. When do you have the least amount of kinetic energy?

What is needed for work to be done? A force must push on an object without moving it. A force must pull on an object without moving it. A force must cause an object to move along the same direction as the force.

Ikes teacher tells him that this process has caused each strip of tape to gain a negative electric charge. What could ike do next to demostrate that the negative charge of each strip has generated an electric field

Suppose you have two cars, and the larger one is twice as massive as the smaller one. If you and a friend push on them so that their acceleration are equal, how must the forces applied to the cars compared?

You are standing on perfectly slippery ice. You have a tennis racket and a backpack full of tennis balls, and you propel yourself southward by hitting the tennis balls northward against a brick wall.

Why is static electricity not useful as a powersource? * ?

A pulley system used to lift car tires has a mechanical advantage of 8.1. If you pull on the pulley with a force of 540 N, how much force does the pulley exert on the tire?

An object of mass 1000 kg, initially having a velocity of 100 m/s, decelerates to a final velocity of 20 m/s. what is the change in kinetic energy of the object, in kj?

Find the momentum of a 25 kg object going 4m/s to the right.

In the following diagram, the clockwise torque is equal to ___.

A stone was dropped off a cliff and hit the ground with a speed of 112 ft/s. what is the height of the cliff? (use 32 ft/s2 for the acceleration due to gravity.) ft ft