Force and Motion_G7

Force and Motion_G7

by Irvani Prasanti

​LEARNING OBJECTIVES :

1. ​Define force

2. ​Describe effect of force

3. Understand what is meant by balanced and unbalanced forces

4. Describe the effects of balanced forces on motion

5. Describe the effects of unbalanced forces on motion

​SI Unit for Force

​Unbalanced Force can cause an effect of force

​Animation of Balanced and Unbalanced Force

​https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html

​Example 1 :

​Example 2 :

​Example 3 :

Multiple Choice

Which of the following is an example of a balanced force?

• An aeroplane taking off.

• Kicking a football.

• A car slowing down.

• A boy standing still.

Multiple Choice

Which of the following is an example of an unbalanced force?

Multiple Choice

Which of the following correctly describes a system with a net force of 0N?

• The system would be balanced, therefore the object would move

• The system would be balanced, therefore the object would not move

• The system would be unbalanced, therefore the object would move

• The system would be unbalanced, therefore the object would not move

Multiple Choice

What is the unit for force?

• Joules (J)

• seconds (s)

• Newtons (N)

• meters (m)

Multiple Choice

How will this object move?

• The object will move to the left, as the forces are balanced.

• The object will move to the right, as the forces are unbalanced.

• The object will move to the left, as the forces are unbalanced.

• The object will move to the right, as the forces are balanced.

Multiple Choice

What is the net force?

• 50 N balanced right

• 950 N unbalanced left

• 50 N unbalanced left

• 950 N balanced right

Multiple Choice

What is the net force?

• 22 N unbalanced right

• 22 N balanced left

• 2 N balanced right

• 2 N unbalanced right

Multiple Choice

What is the net force?

• 0 N balanced

• 2000 N unbalanced

• 0 N unbalanced right

• 2000 N balanced

​THANKS

​Any Questions ?