what direction does friction act?

What direction does friction act?

Opposite of motion

What type of force causes a change in motion?

Unbalanced Force

The force of gravity on a person or object on the surface of a planet is called....

Weight

What equation best describes Newton’s second law of motion?

F=ma

A falling bowling ball accelerates from 5 m/s to 23 m/s in a time of 2 s. What is the bowling ball’s acceleration?

9 m/s2

Energy and work are both measured in …..

Joules (J)

A ferris wheel turning at a constant rate is…

Accelerating

A straight horizontal line on a distance-time graph means what…

Stopped – no movement

When you are riding in a car and the car suddenly stops, you continue to move forward because of…

Inertia

Describe the energy transfer as a book is falling off a shelf.

GPE gets smaller as KE gets larger

What type of heat transfer occurs when you touch a hot stove?

Conduction

Sitting next to a hot fire is an example of what type of heat transfer?

Radiation

Distance between two crests or two troughs …

Wavelength

As the frequency of a wave increases, what happens to the wavelength?

Decreases

Sound travels as what type of wave?

Longitudinal

Water waves bending around a barrier of land is an example of what?

Diffraction

What three factors will increase the speed of sound?

Stiffer mediumHigher temperatureLower density