*Q1. Define force. Give an activity to show effect of balance & Unbalanced force.*
*Q2. Give an activity to show that force can be added algebraically.*
Answers
Answer:
FORCE IS DEFINED AS A PUSH OR PULL WHICH CHANGES OR TRIES TO CHANGE THE STATE OF MOTION OF A BODY WHEN ACTING ON IT.
Explanation:
What are Balanced Forces?
If the resultant force of all the forces acting on a body sums up to zero, then the forces acting on the body are known as balanced forces. Let us look at some examples of balanced forces and understand how the body’s state of motion remains unaffected.
Balanced Forces Examples
Suppose you are pushing a wall, and as expected, the wall does not move and neither do you. It means that you and the wall are exerting a balanced force on each other.
Balanced Force
When the man pushes against the wall, the forces at play balances each other, and as a result, the wall does not move.
The image below shows a game of tug of war between equally matched opponents. Neither of the participating teams can pull the other team towards themselves due to balanced forces.
What are Unbalanced Forces?
When the resultant force acting on a body is not equal to zero, the forces acting on the body are known as unbalanced forces. The body acted upon by unbalanced forces changes its state of motion. Let us look at some examples of unbalanced forces to understand their nature better.
Unbalanced Forces Examples
Let us consider the same tug of war example that we discussed in the previous section.
When the forces are balanced, neither of the team, but if the rope moves away in a particular direction or if a team wins, then the forces applied by both teams are unbalanced.
Practically anything that moves is a result of the exertion of unbalanced forces on it. If you kick a football and it moves from one place to another, it means that the unbalanced troops are acting upon it.
Unbalanced Force
The ball moves from one place to another after it’s kicked. This is an example of an unbalanced force.
The image below shows two people on a seesaw. The person on the right is significantly heavier than the person on the left, and the seesaw is effectively tilted towards him. This is an example of unbalanced forces.
Unbalanced Force
One person significantly heavier than the other creates a condition of unbalanced forces in a seesaw.
The above image shows two people on a seesaw. The person on the right is significantly heavier than the person on the left and the seesaw is effectively tilted towards him. This is an example of two unbalanced forces.