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4 years ago

Help guys Jehdjdbdbxzjjxxjixhwvwbsbsbs

Physics

1 answer:

Andrew [12]4 years ago

6 0

Answer:

<em>12.5watts</em>

Explanation:

Power = Workdone/Time

Since workdone = Force * Distance

Power = Force *distance/Time

Given

Force = 150N

Distance = 10m

Time = 2 minutes = 120seconds

Required

Power

Substitute the given values into the formula;

Power = 150 * 10/120

Power = 1500/120

Power = 12.5Watts

Hence his power is 12.5watts

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If the frequency of a wave is doubled, what happens to its wavelength? If the frequency is doubled, the wavelength is only half as long.

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A wooden block measuring 50 cm by 100 cm by 200 cm has a mass of 8000 g.

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The density of the block is mathematically given as

$\phi=8e-4$

<h3>Density of block</h3>

Question Parameters:

50 cm by 100 cm by 200 cm has a mass of 8000 g.

Generally the equation for the density is mathematically given as

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Where

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Therefore

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3 years ago

If you throw your annoying little sister down the stairs with a force of 60 N and she weighs 30 kg. What’s her acceleration rate

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3 years ago

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Vector A= 3.7 i + 1.0 j and vector B = 3.0 i + 6.5 j. What is vector<br> (A-B).A?

kicyunya [14]

Answer:

(A - B).A = -2.91

Explanation:

First, let's define the sum and dot product of vectors.

For two vectors V = (x₁, y₁) and W = (x₂, y₂) we have:

sum (or subtraction):

V + W = (x₁, y₁) + (x₂, y₂) = (x₁ + x₂, y₁ + y₂)

dot product:

V.W = (x₁, y₁).(x₂, y₂) = x₁*x₂ + y₁*y₂

Here remember the notation:

V = x₁*i + y₁*j = (x₁, y₁)

Now let's solve our problem, we have:

A = (3.7, 1.0)

B = (3.0, 6.5)

Then:

(A - B).A = ( (3.7, 1.0) - (3.0, 6.5) ).(3.7, 1.0)

= (3.7 - 3.0, 1.0 - 6.5).(3.7, 1.0)

= (0.7, -5.5).(3.7, 1.0) = (0.7*3.7) + (-5.5)*(1.0) = -2.91

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3 years ago