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DiKsa [7]
2 years ago
10

A ramp is used to lift a refrigerator a height of 12 m with a force of 110 N. The ramp is at an angle of 50° to the ground.How m

uch work is being done
Physics
1 answer:
nikitadnepr [17]2 years ago
8 0

Answer:

848.5 J

Explanation:

We are given that

Height,h=12 m

Force,F=110 N

\theta=50^{\circ}

We have to find the work done .

We know that

Work done,W=Fscos\theta

Using the formula

W=110\times 12cos50

W=848.5 J

Hence,the work done=848.5 J

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A vaulter holds a 26.90-N pole in equilibrium by exerting an upward force U with her leading hand and a downward force D with he
ivolga24 [154]

Answer:

Check attachment for better understanding

Explanation:

Given that

a= 0.75m

b=1.31m

c= 2.2m

Weight of pole is 26.90

Then, Fg = Weight = 26.90

Using Equilibrium of forces

ΣFy = 0

U — D — Fg = 0

U — D = Fg

U — D = 26.9

To calculate U,

We will take moment about point A.

ΣMa = 0

Let the clockwise moment be positive and anti-clockwise be negative

Fg(a+b) — U(a) = 0

26.9(1.31+0.75) —0.75U = 0

26.9(2.06) = 0.75U

0.75U = 55.414

U = 55.414/0.75

U = 73.89 N

To calculate D,

U — D = 26.9

73.89—D =26.9

73.89—26.9 = D

D = 46.99N

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3 years ago
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What pressure expressed in pascals equals 70 N/m2?
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Pascals = N/m2
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Which organism in the food web above is sometimes a first-level consumer and sometimes a second-level consumer?Explain
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The 2nd organism is the first level or primary consumer. Ex. Mouse - It eats the producer, so it is a herbivore. 
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All endothermic reactions absorb heat and make the surroundings warm
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Answer:

b: false

Explanation:

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