Question

1. If a 5 tons beam is raised 6 meters, what is it's potential energy? If it is raised another 8 meters in 6 seconds, what is the work done?

Answer 1

Hey there!

Case I
Given,
Mass(m) = 5 tons = 5000 kg
Height(h) = 6 m

We know,
P.E = mgh
      = 5000 * 9.8 * 6
      = 294000 joule

Case II:

Mass(m) = 5000 kg   [same as before]
Height(h) =  8 meters 

Work isn't effected by time. But, As potential energy(P.E) will increase so more amount of work will be done.

P.E = mgh
      = 5000 * 9.8 * 8
      = 392000 joule

Hope It Helps YoU!

Answer 2

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✴✴ Here is your answer↓⬇⏬⤵

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▶⏩ CASE 1.

=> It is given that:-)

↪ Mass = 5 tons ➡ 5000 kg.

↪ Height= 6 metres.

↪ Acceleration due to gravity= 9.8 m/sec².

=> Potential energy= Mgh.

= 5,000 × 9.8 × 6.

= 2,94,000 joules.✔✔.

▶⏩ CASE 2.

=> It is given that:-)

↪ Mass= 5000 kg.

↪ Height= 8 metres.

↪ Acceleration due to gravity= 9.8 m/ sec².

=> Potential energy= Mgh.

= 5000 × 9.8 × 8.

= 3,92,000 joules.

→ Hence, work done is not effective in time.
and the potential energy gives amount of work done.

➡↪ Work done= 3,92,000 joules.✔✔.

✴✴ Thanks ✴✴.

☺☺☺ hope it is helpful for you ✌✌✌.