Introduction to Forces
What is force?
Force is a push or a pull
What are contact and noncontact forces?
Contact forces are forces that act between two objects that are physically touching each other.
A non-contact force is a force applied to an object by another body that is not in direct contact with it.
What are the three different types of motion?
Rectilinear, Circular, Oscillatory
What are balanced forces?
When two forces are the same strength but act in opposite direction, they are called balanced forces
Define push and pull forces
A pull is when you use force to move a thing (object) closer to you. Push. A push is when you use force to move a thing (object) away from you.
What are external and internal forces?
External forces are forces that act on an object from the outside of the system. Internal forces are forces that act on an object from the inside of the system
Give two examples of rectilinear motion.
An athelete running in a marathon, driving on a highway
What are unbalanced forces?
Forces applied to an object in opposite directions that are not equal in size
Give examples from daily life where you use force
Running, cycling, jumping, walking
Give two examples of internal forces
Tension, Bending
Give two examples of Oscillatory Motion
A pendulum, guitar strings
Give an example of a balanced force
An object resting on the table. It exerts force on the table and the table exerts an equal force on the object
What are some of the effects of applying force?
It can stop a moving body or slow it down.
It can accelerate the speed of a moving body.
It can also change the direction of a moving body along with its shape and size.
Compression is an example of ________
A boat tossing up and down a river is an example of ________________
Oscillatory Motion
An object sinking in water is an example of a balanced/unbalanced force
Unbalanced Forces
What is our central idea? Justify
The shape and position of an object can be affected by internal and external factors
List down all the forces that are applicable when a person is running a marathon. Categorize these forces into contact/ noncontact, external/ internal forces.
Friction - Contact, external
Air resistance - Contact, External
Muscular Force- Contact, External
Explain the three types of motion with examples that have not been discussed in class
Rectilinear Motion- Motion in a straight line
Circular Motion - Motion of an object along a circular path
Oscillatory Motion- The to and fro motion of an object
What are the effects of unbalanced forces?