Power
is calculated by dividing the work done with the time interval of the motion.
Work, on the other hand, is force times the distance traveled. Therefore, we
can calculate as follows:<span>
Power=W/t = mgd/t
90 = 60(9.81)d / 40
d = 6.12 m
Number of steps = 20/6.12 = 3.27 or 3 steps</span>
Answer:
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Explanation:
When a boy throws a ball and accidentally breaks a window, the momentum of the ball and all the pieces of glass taken together after the collision is THE SAME as the momentum of the ball before the collision
2 m/s/s means the velocity increases by 2 m/s every second.
Answer:
441.45N
Explanation:
Weight = mass(kg) x acceleration (m/s^2)
Weight = 45kg x 9.81m/s^2=441.45N
Recall that weight =mass of the rock x gravitational force acting on the rock
Therefore, the rock will weigh = 441.45N
