1. When a spring scale is used to do work pulling a cart to the top of an incline, the elastic energy stored in the spring is converted into gravitational potential energy, since the top of an incline has a certain height.

2. The roller coaster get its gravitational potential energy from the kinetic energy it carries when it moves with a certain velocity.

3. Truckers use a ramp because it is easier to load a truck with less applied force. Although the work required is the same, without the ramp the force that they should apply is much greater, hence more difficult.

$W = F_1 \times h\\W = F_2 \times d \times \cos(\theta)$

h is greater than (d x cos(Θ)), hence F2 is smaller than F1.

7 0

4 years ago

There are three known forms of uranium. These forms are called _____ of each other.

otez555 [7]

Answer:

A. Isotopes

Explanation:

The answer is isotopes. Isotopes are different kind of atoms of the same element.

3 0

3 years ago

If you press as hard as you can against a brick wall until you begin to sweating and breathing hard did you do any work on the w

Reika [66]

No, as long as nothing moves you aren't doing work, since W=F.s. You have no s, so no W

4 0

3 years ago