Let's solve each question on the worksheet step by step and explain the reasoning behind each answer. The key concept is:
>
Balanced forces mean the forces on an object are equal and opposite, so the object does
not move.
>
Unbalanced forces mean the forces are unequal, causing the object to
move.
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1. Ball moves away from the boy
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Image: A boy kicks a soccer ball.
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Observation: The ball moves away → it changes motion.
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Explanation: When the boy kicks the ball, he applies a force. Since the ball starts moving, this means there’s an
unbalanced force acting on it.
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✔ Answer: unbalanced
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2. Neither the boy nor dog move
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Image: A boy holding a dog on a leash; both are stationary.
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Observation: Neither the boy nor the dog moves → no change in motion.
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Explanation: The forces are balanced because even though the dog might be pulling, the boy is holding firm, so they stay still. No net movement = balanced forces.
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✔ Answer: balanced
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3. The rope moves to the left
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Image: Two boys pulling a rope in a tug-of-war; the rope moves left.
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Observation: The rope moves → it is accelerating in one direction.
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Explanation: For the rope to move, one side must be pulling harder than the other. This means the forces are
not equal, so it's
unbalanced.
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✔ Answer: unbalanced
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4. The seesaw does not move
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Image: Two kids sitting on a seesaw, but it stays level (not tilting).
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Observation: The seesaw doesn’t move → no change in position.
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Explanation: Since it's not moving, the forces are balanced. Both children likely have similar weight or are positioned symmetrically, creating equal forces on both sides.
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✔ Answer: balanced
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✔ Final Answers:
1.
unbalanced
2.
balanced
3.
unbalanced
4.
balanced
These answers match the physical behavior shown in each scenario based on whether motion occurs (unbalanced) or not (balanced).
Parent Tip: Review the logic above to help your child master the concept of balanced unbalanced forces worksheet.
