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Inessa05 [86]
3 years ago
11

1. 1500j of work was done to move a box 20m. What force was applied to the box ?

Physics
1 answer:
Fantom [35]3 years ago
4 0

Answer:

1. 75N

2. 67,983 J (=67.98 kJ)

Explanation:

1. Work = Force x Distance

we are given that Work = 1,500J and Distance = 20m

hence,

Work = Force x Distance

1,500 = Force x 20

Force = 1,500 ÷ 20 = 75N

2. Potential Energy, PE = mass x gravity x change in height

we are given that mass = 165 kg and change in height = 42m

assuming that gravity, g = 9.81 m/s²

Potential Energy, PE = mass x gravity x change in height

Potential Energy, PE = 165 x 9.81 x 42 = 67,983 J (=67.98 kJ)

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tn = 20 seconds

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So from the question, we can calculate T as;

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F=ILB \sin \theta
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