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

IMG_4859Object is moving with constant speed

IMG_4858 Object is stationary

IMG_4860 Speed is increasing (acceleration)

IMG_4857 Speed is decreasing (deceleration)

IMG_4863 Speed is constant, acceleration is zero

IMG_4864 Acceleration is constant

IMG_4865
Acceleration is increasing

IMG_4866 Acceleration is decreasing

Calculating distance in a speed-time graph

Area under the curve in
V-t graph is equal to distance

8BAF2BF4-46E3-4614-9AB1-2B8A81B3B174 The distance covered by the object is shaded in red.
The formula to calculate the distance in this graph is 1/2 (base)(height)

9E7D0912-40E8-4822-BE66-FB29F824B423The 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.

IMG_4928

  1. Constant acceleration
  2. Decreasing acceleration
  3. Terminal velocity
  4. Decreasing acceleration (parachute opened)