what direction does friction act?
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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. - PowerPoint PPT PresentationTRANSCRIPT
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