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dem82 [27]
3 years ago
9

A load of 800 N is lifted using a block and tackle having 5 pulleys. If the applied effort is 200 N, calculate

Physics
2 answers:
ser-zykov [4K]3 years ago
8 0

Explanation:

Load=800N

Effort=200N

1. Mechanical Advantage = LOAD/EFFORT

= 800N/200N

= 4

2 Velocity Ratio = no. Of pulleys =5

3. Efficiency = Mechanical advantage / velocity ratio × 100%

= (4/5)×100%

=80%

4. output work= load×load distance

= 800N × 5m

= 4 × 1000J

5. Efficiency = (output work/input work) ×100%

Or, 80% = (4000J/input work) ×100%

Or, 80%/100% = 4000J/inputwork

Or, 4/5 = 4000J/inputwork

Or, input work =4000J × 5/4

Input work = 5×1000J

I hope it helped! ;-)

never [62]3 years ago
4 0

Answer:

I got the same answers.

Explanation:

I agree with the first person respone.

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