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3 years ago

NEED HELP FAST ILL MARK BRAINLIEST AND RATE 5 STARS AND SAY THANK YOU

Physics

2 answers:

daser333 [38]3 years ago

8 0

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

Change in speed = (end speed) - (start speed)

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

Time for the change = 5.00 seconds

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

<em>Acceleration = -2 m/s²</em>

That's choice-A .

nexus9112 [7]3 years ago

8 0

Hello!

A car going 72.0 km/h (20.0 m/s) slows down to 36.0 km/h (10.0 m/s) in 5.00 seconds. Calculate the acceleration in m/s² .

We have the following data:

a (acceleration) = ? (in m/s²)

Vi (initial velocity) = 20 m/s

Vf (final velocity) = 10 m/s

Δv (velocity variation) = Vf - Vi , then:

$\Delta{V} = V_f - V_i$

$\Delta{V} = 10 - 20$

$\Delta{V} = - 10\:m/s$

Δt (time variation) = 5 s

We apply the data to the average acceleration formula, see:

$a = \dfrac{\Delta{V}}{\Delta{T}}$

$a = \dfrac{- 10\:\dfrac{m}{s} }{5\:s}$

$\boxed{\boxed{a = - 2\:\dfrac{m}{s^2} }}\end{array}}\qquad\checkmark$

Answer:

A. -2.00

_______________________________

I Hope this helps, greetings ... Dexteright02! =)

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<u>Given information</u>

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Considering that thickness is given to 3 significant figures while uncertainty is to 1 significant figure, the final answer should also conform to these hence giving the first part of the answer to 3 significant figures while second part to 1 significant figure yields 0.0113 ±0.0001 inches

(b)

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3 years ago

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Answer:

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Explanation:

Given:

v = speed = 13 m/s

Pf = final power when the log is pulled = 8.5x10⁴W

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The force required to move a car is equal to:

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3 years ago

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Natasha_Volkova [10]

Answer:

Part a)

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Explanation:

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Answer:

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Now replacing:

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r = 5.0 m
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Using the formula of the sphere area we get:

a = 4 * π * r²

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Applying the pressure formula we get:

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<h3>What is pressure?</h3>

It is a physical quantity that expresses the force applied on the area of a surface.

Learn more about pressure at: brainly.com/question/26269477

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1 year ago