2.3 Flashcards
1
Q
air resistance
A
Resistance that arises because a moving object has to push the air in front of it aside.
2
Q
friction
A
Resistance that arises when two surfaces move against one another, such as a ski gliding over snow.
3
Q
Newton’s First Law
A
An object for which the resultant is 0 N is either stationary or it moves along a straight line with a constant speed.
4
Q
resistance
A
A force that resists a motion and acts against that motion.
5
Q
Rolling resistance
A
Resistance that arises when a rolling object and the ground both become deformed during the motion.
6
Q
Newton (N)
A
the unit of force
7
Q
contact force
A
force that acts when 2 objects touch eachother.
8
Q
non-contact force
A
Type of force that acts over a distance without direct contact between objects.
