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dezoksy [38]
3 years ago
5

2. Moving ocean water exerts a force of 375 N on a boat, causing the boat to move a distance of 34.7 m in 8.34 s. What power doe

s the boat produce in kW?
Knowns Unknown

d = ________________ t = _________________ P = ?

F = ________________
Solve for the Unknown (Use the definition of Power)

Physics
1 answer:
sasho [114]3 years ago
8 0
1.56 kW , working shown in photo

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You go rock climbing with a pack that weighs 70 N and you reach a height of 30 m. how much work did you do to lift your pack? If
Vikentia [17]
When you climb, earth exerts gravitational force on pack in downward direction(pointing towards the center of earth).
In order to climb, you need to work against work done by gravity on the pack.
Hence work done by you = work done by gravity on pack 
                                        = Force x displacement = 70 x 30 = 2100 J.
 
So you need to do 2100 joules of work to lift your pack.

Power is the rate of work done.
Therefore power = work done by you/time(in seconds)
                            =     2100/600 =3.5 watts 
8 0
3 years ago
Please help on this one?
butalik [34]

B. +Q, + W are the correct sign

7 0
3 years ago
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Which of the following is strenuous?
Arada [10]

Answer:

I think it c

Explanation:

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3 years ago
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Liono4ka [1.6K]
3.A

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4 0
3 years ago
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A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the groun
Gala2k [10]

Answer: 83.8 m/s

Explanation:

momentum of shell = momentum of cannon

M(s) × V(s) = M(c) × V(c)

M(s) = mass of shell, V(s) = velocity of shell

M(c) = mass of cannon, V(c) = velocity of cannon

100kg × 75m/s = 90kg × V(c)

7500 = 90 × V(c)

7500 ÷ 90 = V(c)

83.3 = V(c)

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3 years ago
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