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Tick the most appropriate answer.
Which of the following is a contact force?
Concept: undefined >> undefined
Fill in the blank.
The force acting on a mango falling from a tree is an example of .....................
Concept: undefined >> undefined
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Match the following
| Column A | Column B |
| (a) Solids | (i) Can flow in all directions |
| (b) Sublimation | (ii) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (iii) Any number of free surfaces. |
| (d) Gases | (iv) Gaps between particles. |
| (e) Intermolecular space | (v) Changes of state from solid to gas. |
Concept: undefined >> undefined
State if the following statement is true or false. Correct the statement if it is false.
Gravitational force is a contact force.
Concept: undefined >> undefined
Match the column.
| Column A | Column B |
| 1. iron and gold | a. molecules are very far apart |
| 2. melting | b. pure substance |
| 3. intermolecular space | c. non-metals |
| 4. compound | d. the space between the molecules |
| 5. gases | e. changes from solid to liquid |
| f. metals |
Concept: undefined >> undefined
State if the following statement is true or false. Correct the statement if it is false.
Force applied on an object can increase its mass.
Concept: undefined >> undefined
State if the following statement is true or false. Correct the statement if it is false.
Friction always acts in the direction of motion of an object.
Concept: undefined >> undefined
Answer the following in a word or two or in a sentence.
Give an example in which a force can change the direction of an object.
Concept: undefined >> undefined
Answer the following in a word or two or in a sentence.
Which force is responsible for supporting the weight of a book placed on a table?
Concept: undefined >> undefined
Answer the following in a word or two or in a sentence.
Name the force that is responsible for the falling of a stone from a height to the ground.
Concept: undefined >> undefined
Answer the following in a word or two or in a sentence.
What do you understand by magnetic force?
Concept: undefined >> undefined
Answer the following in short.
What will happen to an object if two equal forces act on it in opposite directions?
Concept: undefined >> undefined
Answer the following in short.
Why does a charged balloon stick to a wall?
Concept: undefined >> undefined
Match the following:
| Column A | Column B |
| (a) Needle | (1) class II lever |
| (b) Doorknob | (2) inclined plane |
| (c) Ramp | (3) Class I lever |
| (d) Lemon crusher | (4) Wheel and axle |
| (e) Seesaw | (5) wedge |
Concept: undefined >> undefined
Answer the following in detail.
List all the forces acting on a boy sitting on a chair with the help of a suitable diagram.
Concept: undefined >> undefined
Answer the following in detail.
Differentiate between mass and weight of an object.
Concept: undefined >> undefined
Multiple choice question.
Which one is a kind of matter:
Concept: undefined >> undefined
Identify the agent exerting the force, the object on which the force is acting and the effect of the force in the following situation
Squeezing out the juice from an orange.
Concept: undefined >> undefined
Identify the agent exerting the force, the object on which the force is acting and the effect of the force in the following situation
Taking out ointment from a medicinal tube.
Concept: undefined >> undefined
Multiple choice question.
All kinds of matter
Concept: undefined >> undefined
