Let's solve the problems step by step.
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Q.2. Fill in the blanks with suitable words.
a) A ________ is a push or a pull that acts on an object.
✔ Answer: *Force*
Explanation: Force is defined as a push or a pull acting on an object, which can cause it to accelerate, decelerate, or change direction.
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b) The amount of force is measured in ________.
✔ Answer: *Newtons (N)*
Explanation: The SI unit of force is the Newton (N). One Newton is the force required to accelerate a 1 kg mass at 1 m/s².
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c) ________ is a force that opposes the motion of an object.
✔ Answer: *Friction*
Explanation: Friction is a resistive force that acts between two surfaces in contact and opposes the relative motion or tendency of motion between them.
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Q.3. Label the types of friction.
We are given four images and need to identify the type of friction in each:
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Image 1: Person skiing on snow
- The skis are sliding over snow.
- This is
sliding friction.
-
✔ Label: *Sliding Friction*
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Note: Even though it’s on snow, the interaction is still a sliding surface, so it's classified under sliding friction.
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Image 2: Person riding a bicycle
- The wheels roll on the road.
- This involves
rolling friction.
-
✔ Label: *Rolling Friction*
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Image 3: Person swimming in water
- The swimmer moves through water, which resists motion.
- This is
fluid friction (specifically, water resistance).
-
✔ Label: *Fluid Friction*
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Image 4: Child pushing a door with no motion
- The child is trying to move the door but it doesn’t move.
- This means
static friction is acting — it prevents motion until the applied force exceeds the maximum static friction.
-
✔ Label: *Static Friction*
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✔ Final Answers:
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Q.2:
a) A
force is a push or a pull that acts on an object.
b) The amount of force is measured in
Newtons.
c)
Friction is a force that opposes the motion of an object.
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Q.3: Types of Friction
1.
Sliding Friction → Skiing
2.
Rolling Friction → Bicycle
3.
Fluid Friction → Swimming
4.
Static Friction → Pushing door (no motion)
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Let me know if you'd like a diagram version or further explanation!
Parent Tip: Review the logic above to help your child master the concept of friction force worksheet.
