Questions

questions in on sentence. [1 M]

Take a timed test

27 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
What is muscular force? Why is it called a contact force?
Answer
Muscular force: The force resulting from the action of muscles is known as muscular force. Since muscular force can be applied only when it is in contact with an object, it is also called a contact force.
View full question & answer
Question 31 Mark
A chapati maker is a machine that converts balls of dough into chapatis. What effect of force comes into play in this process?
Answer
The force changes the shape of the dough.
View full question & answer
Question 41 Mark
A girl is pushing a box towards the east. In which direction should her friend push the box so that it moves faster in the same direction?
Answer
Towards the east.
View full question & answer
Question 51 Mark
What happens when the two forces act in the opposite direction on an object?
Answer
If two different forces act in opposite directions on an object, the net force acting on it is the difference between the two forces.
View full question & answer
Question 61 Mark
A gas-filled balloon moves up. Is the upward force acting on it larger or smaller than the force of gravity?
Answer
Upward force is larger than the force of gravity.
View full question & answer
Question 91 Mark
A ball of dough is rolled into a flat chapatti. Name the force exerted to change the shape of the dough.
Answer
Muscular force.
View full question & answer
Question 111 Mark
During dry weather, clothes made of synthetic fibre often stick to the skin. Which type of force is responsible for this phenomenon?
Answer
Magnetic force
View full question & answer
Question 121 Mark
What will be the net force on an object when two forces act on an object in the same direction?
Answer
Forces applied on an object in the same direction add to one another.
View full question & answer
Question 241 Mark
What is contact force?
Answer
A force that can be applied only when it is in contact with an object is called a contact force.
View full question & answer
Question 251 Mark
What is muscular force?
Answer
The force resulting from the action of muscles is known as muscular force.
View full question & answer