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Choose the correctly matched pair:
- a)A fielder catching a ball - Decreases time of impact
- b)High jump on cushioned bed - Increases time of fall
- c)Karate player breaking ice - Decreases force applied
- d)First law of motion - F = ma
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Choose the correctly matched pair:a)A fielder catching a ball - Decrea...
Understanding the Correct Answer: High Jump on Cushioned Bed
The correct answer is option 'B' - High jump on cushioned bed - Increases time of fall. Let’s break this down for clarity.
What Happens During a High Jump?
- When an athlete performs a high jump, they propel themselves upwards.
- Upon reaching the peak of their jump, they begin to fall back down.
Impact of Cushioned Surface
- Landing on a cushioned bed significantly alters the dynamics of the fall.
- A cushioned surface increases the time taken to come to a complete stop when the athlete lands.
Physics Behind Time of Fall
- According to the impulse-momentum theorem, when the time of impact is increased, the force experienced during landing is reduced.
- This is because force is the change in momentum over time (F = Δp/Δt). By extending Δt (time), the force (F) decreases.
Benefits of Increasing Time of Fall
- Reduces the risk of injury by allowing the body to decelerate gradually.
- Enhances comfort and safety during landings, especially in sports where falls are common.
Conclusion
- Thus, landing on a cushioned bed effectively increases the time of fall, making option 'B' the correct choice.
- Understanding these principles is essential in sports science and biomechanics for improving performance and safety.
The correct answer is option 'B' - High jump on cushioned bed - Increases time of fall. Let’s break this down for clarity.
What Happens During a High Jump?
- When an athlete performs a high jump, they propel themselves upwards.
- Upon reaching the peak of their jump, they begin to fall back down.
Impact of Cushioned Surface
- Landing on a cushioned bed significantly alters the dynamics of the fall.
- A cushioned surface increases the time taken to come to a complete stop when the athlete lands.
Physics Behind Time of Fall
- According to the impulse-momentum theorem, when the time of impact is increased, the force experienced during landing is reduced.
- This is because force is the change in momentum over time (F = Δp/Δt). By extending Δt (time), the force (F) decreases.
Benefits of Increasing Time of Fall
- Reduces the risk of injury by allowing the body to decelerate gradually.
- Enhances comfort and safety during landings, especially in sports where falls are common.
Conclusion
- Thus, landing on a cushioned bed effectively increases the time of fall, making option 'B' the correct choice.
- Understanding these principles is essential in sports science and biomechanics for improving performance and safety.
Community Answer
Choose the correctly matched pair:a)A fielder catching a ball - Decrea...
Option A: A fielder catching a ball - Decreases time of impact:
Incorrect: When a fielder catches a ball, he pulls his hands backward to increase the time of impact, which decreases the force exerted on his hands.
Incorrect: When a fielder catches a ball, he pulls his hands backward to increase the time of impact, which decreases the force exerted on his hands.
Option B: High jump on cushioned bed - Increases time of fall
Correct: In a high jump event, athletes fall on a cushioned bed or sand bed to increase the time it takes for them to come to a stop, thereby decreasing the force of impact.
Correct: In a high jump event, athletes fall on a cushioned bed or sand bed to increase the time it takes for them to come to a stop, thereby decreasing the force of impact.
Option C: Karate player breaking ice - Decreases force applied
Incorrect: A karate player breaks a slab of ice with a single blow by applying a large force over a very short period of time.
Incorrect: A karate player breaks a slab of ice with a single blow by applying a large force over a very short period of time.
Option D: First law of motion - F = ma
Incorrect: The first law of motion states that an object will remain at rest or in uniform motion unless acted upon by an external force. The equation F = ma is Newton's second law of motion.
Incorrect: The first law of motion states that an object will remain at rest or in uniform motion unless acted upon by an external force. The equation F = ma is Newton's second law of motion.
Thus, the correctly matched pair is Option B: (b) High jump on cushioned bed - Increases time of fall.
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Choose the correctly matched pair:a)A fielder catching a ball - Decreases time of impactb)High jump on cushioned bed - Increases time of fallc)Karate player breaking ice - Decreases force appliedd)First law of motion - F = maCorrect answer is option 'B'. Can you explain this answer?
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