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damonsalvatoreisbae
06.03.2020 •
Physics
2. A 1.00 x 103 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the
average power output of automobile engine?
a. 20.8 kW
b. 30.3 kW
C. 41.7 kW
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Ответ:
C = 41.7kW
Explanation:
Data ;
Mass (M) = 1x10³kg
Initial velocity (u) = 0m/s
Final velocity (v) = 25m/s
Time (t) = 7.5s
Power = Work / time
Work = force * distance
acceleration = average velocity/ time
Acceleration = (25 - 0) / 7.5 = 3.3m/s²
Power = force * velocity (speed)
Average velocity = (25 - 0) / 2 = 12.5m/s
Force = mass * acceleration = 1x10³ * 3.3 = 3333.33N
Power = force * velocity
Power = 3333.33 * 12.5 / 41666.67W
Ответ:
study
Step-by-step explanation: