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tensa zangetsu [6.8K]

3 years ago

14

A car takes off from a stop sign and is going 267 m/s after 4.5 seconds. a) Determine the acceleration of the car. Show your wor

k and include units

1 answer:

gizmo_the_mogwai [7]3 years ago

3 0

Answer:

49.33333m/s²

Explanation:

The formula for acceleration is <em>acceleration=change in velocity/change in time</em>

<em>So: </em>

<em>Iv= 0m/s</em>

<em>Fv= 267m/s</em>

<em>a=267m/s divided by 4.5s</em>

<em>a=49.3333m/s²</em>

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A 2-kg ball is thrown at 3 m/s. What is the ball's momentum? *

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A car accelerates uniformly from rest to speed 6.6 m/s in 6.5 s .Find the distance the car travel during this time .

kirill [66]

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<u>Motion With Constant Acceleration </u>

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$v_f=v_o+at\qquad\qquad [1]$

Where:

a = acceleration

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The distance traveled by the object is given by:

$\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad\qquad [2]$

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$\displaystyle a=\frac{v_f-v_o}{t}$

Substituting the given data vo=0, vf=6.6 m/s, t=6.5 s:

$\displaystyle a=\frac{6.6-0}{6.5}$

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A 3.50-meter length of wire with a cross-sectional area of 3.14 × 10-6 meter2 is at 20° Celsius. If the wire has a resistance of

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$5.6\times 10^{-8}\ Ohm.m$

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