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3 years ago

24. A anvil with a mass of 60 kg falls from a height of 9.5 m. How fast is it going right

Physics

1 answer:

shepuryov [24]3 years ago

6 0

So they give us this

V=IR

V= 1.8

I=0.4

R=?

So we insert the thing that we know.

1.8=0.4*R

We need to leave our unknown value alone. So if our value of 0.4 is multiplying the unknown value it passes to the other side dividing.

So we have this.

Lastly we solve.

R=4.5ohms

The formula to find R is V=IR

V/I=R

So the resistance will be the Voltage divided by the Current

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Answer:

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What happens when the voltage increases and the resistance stays the same in a electrical circuit?

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Answer:

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Explanation:

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Read 2 more answers

A young parent is dragging a 65 kg (640 N) sled (this includes the mass of two kids) across some snow on flat ground, by means o

Delicious77 [7]

Answer:

b) N = 560 N, c) fr = 138.56 N, d) μ = 0.247

Explanation:

a) In the attachment we can see the free body diagram of the system

b) Let's write Newton's second law on the y-axis

N + T_y -W = 0

N = W -T_y

let's use trigonometry for tension

sin θ = T_y / T

cos θ = Tₓ / T

T_y = T sin θ

Tₓ = T cos θ

we substitute

N = W - T sin 30

we calculate

N = 640 - 160 sin 30

N = 560 N

c) as the system goes at constant speed the acceleration is zero

X axis

Tₓ - fr = 0

Tₓ = fr

we substitute and calculate

fr = 160 cos 30

fr = 138.56 N

d) the friction force has the formula

fr = μ N

μ = fr / N

we calculate

μ = 138.56 / 560

μ = 0.247

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3 years ago