3 years ago

@alexrobin13 A 62 kg box is lifted 12 meters off the ground. How much work was done?

Physics

2 answers:

34kurt3 years ago

6 0

7291.2! I'm for sure this is the right answer.

nevsk [136]3 years ago

3 0

Given:
weight=62 kgs
height= 12 m
gravity= 9.8
To find:
work done= mass*gravity*height
solution:
w=62*12*9.8
workdone=7291.2 J

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$W_n_e_t=7.648512 \approx 7.6J$

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$v=0.7844645406 \approx 0.78m/s$

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From the question we are told that

Mass of pitcher $M= 2.6kg$

Force on pitcher $f=8.8N$

Distance traveled $48cm=>0.48m$

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$F=7.1344N$

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$W_f=8.8*0.48=>4.224N\\W_F=7.1344*0.48=>3.424512N$

$W_n_e_t=4.224-3.424512$

$W_n_e_t=0.799488\approx 0.8J$

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$K.E= W_n_e_t$

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$K.E=0.8J$

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$v=\sqrt{\frac{K.E*2}{m} }$

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$v=0.7844645406 \approx 0.78m/s$

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