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madisonsessums8
25.10.2021 •
Physics
a tennis ball is launched from the floor at a velocity of 90 m/a at an angle of 13 degrees to the horizontal. calculate its range
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Ответ:
~186
Explanation:
1) R= (V^2 × sin A ) /g
V=90 m/a
A= 13°
g= 9.8 or 10 (I will take 9.8 for right result)
R= (90^2 × sin 13) / 9.8 = 185.928932672 ~ 186
Ответ:
0.010 m * 13,000 N = 130 N-m
Then, we solve for the work done by the 1,500 N force:
0.10 m * 1,500 N = 150 N-m
We then take the ratio of the efficient:experimental
130 N-m / 150 N-m = 0.87 = 87%