Resultant Forces

Question 0

Resultant force=..?
Can cause….
• if result force = 0 then…?
• result force isn’t 0 then…?

If 2 forces act on an object along same line the resultant force = the sum of the forces if same direction/ difference if in opposite directions!

Answer 0

Resultant force =a single force that has the same effect on the motion as all the original forces acting together

Can cause a change in an object’s state of rest or motion

0- then object stays at rest or at constant speed

Not 0- then velocity of object will change

Question 1

What can forces do?
Unit of force = Newtons (N)

What happens when two objects interact?

Answer 1

Forces can change the shape of an object, change it’s motion, or it’s state of rest

• when they interact they always exert equal and opposite forces on each other!!!

Question 2

Force diagrams

= ….⬅️
What is a parrellogram of forces?

Answer 2

Parrellogram of forces

↗️ ⭕️
↘️.    Calculate distance in the middle with ruler and scale!!!

Question 3

Resultant force!!!
• Bigger it is the greater the acceleration of the object
•greater the mass of the object the smaller it’s acceleration for a given force!
• resultant force equation??

Answer 3

Resultant force (N)
=mass(kg) x acc(m/s^2)

Question 4

Velocity increases if ….?

Velocity decreases if…?

Answer 4

⬆if resultant force is in same direction as velocity

⬇️if resultant force is in opposite direction