shimmerandshine1
10.02.2021 •
Physics
1 poir
2. An upward force is applied to lift a 15 kg box to a height of 5 m at a constant speed. How
nlich work is done on the box?
500 J
65 J
150 J
735 J
Can you please help me
Solved
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Ответ:
D) 735 J(oules)
Explanation:
Work is defined as force * distance
Force is defined as mass * acceleration
Given a mass of 15 kg and a gravitational acceleration of 9.8 m/s² since the box is being lifted up, the force being applied to the box is 15 kg * 9.8 m/s² = 147 N
Since the distance is 5 meters, the work done is 147 N * 5 m = 735 N/m = 735 J, making D the correct answer.
Ответ:
what are we responding too? I'll still help but we don't know what evidence we have
Explanation: