How much energy did you use in lifting the box?

You lift 4.5 kg box from the floor and place it on a shelf that is 1.5 m above the ground.

How simple machines achieve mechanical advantage?

A car has 100 joules of kinetic energy. What will happen to its kinetic energy when a force of 10 Newtons is applied in the direction it is moving over a distance of 5 Meters? A) 50 Joules B) 100 Joules C) 150 Joules D) 500 Joules

An apple in a tree has a gravitational store of 8J. As it falls, it accelerates constantly until it hits the ground. What is the apple's maximum kinetic energy store? Explain your answer.

Explain why a roller coaster's second hill cannot be taller than the first hill.

What is needed to create change in a system?

For glass fragments to be individualized, what must be true? A. They must fit together B. They must have the same density C. They must look the same D. They must be the same color

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770s after leaving the table. Ignore air resistance.