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3 years ago

I need help on 54 plz

Physics

2 answers:

Nutka1998 [239]3 years ago

4 0

Acceleration = (change in speed) / (time for the change)

Change in speed = (ending speed) - (starting speed)

Change in speed = (20 m/s) - (10 m/s)

Change in speed = 10 m/s

Acceleration = (10 m/s) / (5 sec)

Acceleration = <em>2 m/s² forward</em>

dalvyx [7]3 years ago

3 0

Answer:

a = 2 m/s²

Explanation:

average acceleration = change of velocity / change of time

a = Δv/Δt = (20 - 10) / 5 = 10/5 = 2

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The magnitude of the tension in the string marked A is 52.5N

Generally, the equation for is mathematically given as

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So, tanθ = 3/8

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tanα = 5/4

Let's take β be an angle at C (Below x)

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First we take the Horizontal Components

74.9cos(9.46°) = Acos(20.6°) + Bcos(51.3°)

By solving the equation, we get

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Now, we take the vertical components

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By solving the equation, we get

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A = 78.9 - 0.6668× 39.5

A = 52.5N

Hence, the magnitude of the tension in the string marked A is 52.5N

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3 years ago

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<h3>What causes a current in a wire?</h3>

Electric current in a wire, where electrons serve as the charge carriers, is a measurement of the amount of charge that moves through any point of the wire in a given amount of time.
A free electron is drawn to a proton to become neutral if an electron is added to the wire.
Lack of electrons can result from pushing electrons out of their orbits.
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