03 dynamics Flashcards
1
Q
Definition
Force
A
A push or pull that an object exerts on another.
Unit: Newton, N
2
Q
Effects
Forces
A
- Produces motion
- Stops motion
- Change direction of motion
- Increase speed of motion
- Change size/ shape of object
3
Q
Definition
Newton’s 1st Law
A
An object at rest will remain at rest and an object in motion will continue in motion at constant speed in a straight line in the absence of a resultant force.
4
Q
Definition
Newton’s 2nd Law
A
The resultant force acting on an object is equal to the product of the mass and the acceleration of the object; the direction of the force is the same as that of the object’s acceleration.
5
Q
Formula
Newton’s 2nd Law
A
F = ma
m = mass in kilograms
a = acceleration in m/s2
6
Q
Definition
Newton’s 3rd Law
A
If object A exerts a force on object B, then B exerts an equal but opposite force on A.
