Module 2 Dynamics (Part One) Unfinished.

Newton’s First Law states that…

An object at rest stays at rest, and an object in motion stays in motion, unless acted on by an external unbalanced force.

Newton’s Second Law states that…

F = ma, so acceleration =F/M. Acceleration is always in the direction of the resultant force.

Newton’s Third Law states that…

If an object A pushes with a force, F on another object, B, then object B pushes with a force of -F on object A. So forces come in pairs, equal in magnitude but opposite in direction.

If forces are balanced…

The object will move at constant velocity.

If the forces are unbalanced…

The body will accelerate in the direction of the net force.

Weight =

Mass x Gravity

The higher the objects mass/inertia…

The harder it is to change its motion.

If F = ma, how do we manipulate it to find a? Additionally, how do we find m?

a = F/m and m = F/a

How can we find velocity using a = v-u/t

v = u + at

How to resolve horizontal component?

(Adjacent to angle)

= F cos Ø

How to resolve vertical component?

(Opposite to angle)

= F sin Ø

For forces to be in equilibrium…

Net force must be zero.

So with vectors on a plane, the equilibrium triangle is drawn so the…

Resultant vector faces the opposite way (this makes all forces add to zero).

This means you have to…

Reverse direction of resultant force.