10 Questions
What is a force?
A push or pull upon an object due to its interaction with another object
When does a force cease to exist between two objects?
When the interaction between the two objects ceases
Which of these is an example of a force without human or animal effort?
Wind blowing against a tree
What happens when a rubber ball on a smooth surface is pushed gently?
It starts to move
What is one effect of pushing a moving rubber ball harder?
Its speed increases
What happens when you push against the motion of a rolling ball?
The speed of the ball decreases
In what condition does the speed of the ball decrease and it can come to rest?
When pushed against the motion of the ball
Which of the following statements is true about force?
Force exists only as a result of some interaction.
What can a change in the state of motion include?
A change in speed or direction, or both
Which activity demonstrates a change in the state of motion?
Pushing a rubber ball to increase its speed
Study Notes
Motion and Force
- Motion is an integral part of our daily lives, and it can be uniform or non-uniform.
- An object at rest does not start moving on its own; an external force is needed to make it move.
- We exert a force when we push, pull, kick, or lift an object, which involves an external agency (often a muscular effort).
Characteristics of Force
- A force comes into play only when at least two objects interact with each other.
- A force can change the speed, direction of motion, or both of an object.
- The application of force can increase or decrease the speed of an object, depending on its direction.
Effects of Force
- A change in the state of motion of an object is described as a change in its speed, direction of motion, or both.
- A force can bring an object from rest to motion, stop a moving object, or change its direction of motion.
Force and Interaction
- A force exists only as a result of some interaction between two objects.
- Force does not always involve effort by living beings; it can also be due to natural causes.
Examples of Force
- Drawing a bucket from a well, opening or closing a table drawer, squeezing wet clothes, pedaling a bicycle, and moving a loaded trolley all involve force.
- A hockey player taking a penalty corner shot also involves force.
Explore the concept of motion and force in our daily lives, including the characteristics of force and how it affects objects in motion
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
