Select the correct answer.
2 answers:
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Answer:
P = 517.5 [kg*m/s]
Explanation:
We must remember that momentum is defined as the product of force by the time of force duration.
where:
P = momentum [kg*m/s]
F = force [N]
t = time [s]
Answer:
(a)
(b)
Explanation:
The average power is defined as the amount of work done during a time interval:
According to work-energy theorem, the work done is equal to the change in kinetic energy. So, we have:
Recall that the weight is given by:
The car accelerates uniformly from rest (). Replacing (3) in (2), we have:
(a) Finally, we replace this in (1):
(b)