Forces (Motion)
Motion Graphs
Newtons Law Of Motion
First Law (balanced forces)
Second Law (unbalanced forces)
Balanced forces is when acting
forces on an object cancel the effect of eachother and resultant force is zero.
Unbalanced forces when resultant force is acting on an object.
If an object is at rest, will stay at rest
If an object is moving, it will keep on moving
with constant speed.
object can accelerate in the direction of resultant force.
Distance-time graph
Speed-time graph
Object is moving with constant speed
Object is stationary
Speed is increasing (acceleration)
Speed is decreasing (deceleration)
Speed is constant, acceleration is zero
Acceleration is constant
Acceleration is increasing
Acceleration is decreasing
Calculating distance in a speed-time graph
Area under the curve in
V-t graph is equal to distance
The distance covered by the object is shaded in red.
The formula to calculate the distance in this graph is 1/2 (base)(height)
The formula here is (base)(height)
Free fall
When object moves against gravity
In the absence of air resistance (vacuum)
Objects fall at the same rate.
No matter how heavy the objects are.
In the presence of air resistance
The objects with more mass and least volume will hit the ground first.
- Constant acceleration
- Decreasing acceleration
- Terminal velocity
- Decreasing acceleration (parachute opened)