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Shtirlitz [24]
3 years ago
11

If a net force of 25 N is exerted over a distance of 4 m to the right on a 2 kg mass initially at rest and moves it, what is

Physics
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

10 m/s

Explanation:

Force is mass times acceleration:

F = ma

25 N = (2 kg) a

a = 12.5 m/s²

Given:

v₀ = 0 m/s

Δx = 4 m

Find: v

v² = v₀² + 2aΔx

v² = (0 m/s)² + 2 (12.5 m/s²) (4 m)

v = 10 m/s

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The answer is D. C-14.
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Two ranger stations are on an east-west line 110 mi apart. A forest fire is located on a bearing of N 42º E from the western sta
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Answer:

Explanation:

AB = 110 miles

Let the distance of the western station from fire is d.

As according to the diagram, use Sine law

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Are light waves longitudinal or transverse
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Answer:

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Explanation:

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6 0
2 years ago
A piano wire with mass 2.60g and length 84.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplit
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Answer:

Power will be 0.2023 watt

And when amplitude is halved then power will be 0.0505 watt

Explanation:

We have given mass of the Piano wire m = 2.60 gram = 0.0026 kg

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So mass density \mu =\frac{m}{l}=\frac{0.0026}{0.84}=0.0031kg/m

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Frequency f = 120 Hz

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And amplitude A = 1.6 mm = 0.0016 m

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From the relation we can see that power P\ \propto\ A^2

So if amplitude is halved then power will be \frac{1}{4} times

So power will be equal to \frac{0.2023}{2}=0.0505watt

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What is the main difference between magma and lava
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