Forces Flashcards
When forces are applied to an object what does it do?
Start moving if it is stationary
Stop moving if it is already moving
Speed it up
Slow it down
Change its direction
What do you measure the size of a force with?
A newtonmeter
Name two forces that can be applied to an object without any physical contact
Magnetic and gravitational
When an object moves through the air it experiences what?
Frictional forces
What is streamlining?
Shaping to reduce air resistance
What is lubricant?
Substance used to reduce friction between surfaces
What is the turning effect of a force called?
A moment
Unbalanced forces change what?
The speed and/or direction of moving objects
Balanced forces produce what?
No change in the movement of an object
The size of the turning force can be increased by?
Increasing the length of the lever
