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Concept explainers
Which has more acceleration when moving in a straight line—a car increasing its speed from 50 to 60 km/h, or a bicycle that goes from zero to 10 km/h in the same time? Defend your answer.
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The vehicle that have more acceleration when moving in a straight line- a car increasing its speed from 50 to 60 km/h, or a bicycle that goes from zero to 10 km/h in the same time.
Answer to Problem 44A
Both will have the same acceleration.
Explanation of Solution
Given:
Change in speed of the car, Δv1=(60−50) km/h
Change in speed of the bicycle, Δv2=(10−0) km/h
Formula used:
The acceleration acting on an object is given by,
acceleration=change in velocitytime taken
Calculation:
The time taken for change in speed of both the cycle and bicycle is same. Hence, considering the above formula, acceleration will be directly proportional to the change in velocity.
And, considering the given data, the change in velocity is same for both the cycle and bicycle.
Conclusion:
Hence, the acceleration is same for both the cycle and bicycle.
Chapter 4 Solutions
Conceptual Physics: The High School Physics Program
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