SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A car traveling at 6.1 m/s increases its speed to 36.5 m/s in 9.9 s. What assumption can be made about the acceleration of the car?
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The instantaneous acceleration of the car is 2.2 m/s/s.
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The average acceleration of the car is 3.1 m/s/s.
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The instantaneous acceleration of the car is 3.7 m/s/s.
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The average acceleration of the car is 4.3 m/s/s.
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Explanation:
Detailed explanation-1: -A car traveling at 6.1 m/s increases its speed to 36.5 m/s in 9.9 s. What assumption can be made about the acceleration of the car? The instantaneous acceleration of the car is 2.2 m/s/s. The average acceleration of the car is 3.1 m/s/s.
Detailed explanation-2: -If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases. The decreasing speed is called negative acceleration. In both cases, the car is accelerating, but one acceleration is positive and one is negative.
Detailed explanation-3: -Which has greater kinetic energy, a car traveling at 30 km/h or a half-as-massive car traveling at 60 km/h? Both have the same kinetic energy.
There is 1 question to complete.