Chapter 10 Energy and Work done

Front

In which situation do your arms do work on books?

Back

picking up a pile of books from the floor

Front

Using the scientific definition, which statement is always true of work?

Back

It involves a transfer of energy.

Front

Name and describe at least two examples of how different forms of energy can be stored.

Back

Chemical potential energy is stored due to the molecular bonds of food and fuels. Gravitational potential energy is stored due to the gravitational attraction between Earth and the Sun. Elastic potential energy is stored by stretching or compressing a spring.

Front

The kinetic energy from an object’s motion always changes when which factor changes?

Back

the object's speed

Front

At which position(s) does the pendulum have maximum gravitational potential energy?

Back

Position 1 and 5

Front

At which position(s) does the pendulum have maximum kinetic energy?

Back

Position 3

Front

At which point is the kinetic energy of the golf club greatest? Options: point A, point B, point C, point D

Back

point C

Front

Which energy transformation is happening in the photo?

Back

GPE to mechanical

Front

What role does friction play in the conservation of energy?

Back

Friction causes some of the mechanical energy of an object to change into thermal energy. The total energy of a system—potential and kinetic plus any converted energy—remains constant.

Front

A book sliding across a horizontal table slows down and comes to a stop. The book’s kinetic energy was converted into what form of energy?

Back

thermal energy