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3 years ago

if you drive your car at an average speed of 105km/h, how far (in km) will you go in 3hours 30minutes ?

Physics

1 answer:

irinina [24]3 years ago

5 0

Hi ;-)

1 hour ⇒ 105 km

0,5 hour (30 minutes) ⇒ 105 km : 2 = 52,5 km

3 hours 30 minutes ⇒ 3 · 105 km + 52,5 km =

= 315 km + 52,5 km = <u>367,5 km</u>

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c) 2.57s

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If you divide the first equation and the third equation, you can calculate w:

$\frac{x}{a}=\frac{Acos(\omega t)}{-\omega^2 Acos(\omega t)}\\\\\omega=\sqrt{-\frac{a}{x}}=\sqrt{-\frac{-107m/s^2}{0.134m}}=28.25\frac{rad}{s}$

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the mass of the block is given by the formula:

$f=\frac{1}{2\pi}\sqrt{\frac{k}{m}}\\\\m=\frac{k}{4\pi^2f^2}=\frac{427N/m}{(4\pi^2)(4.49Hz)^2}=0.536kg$

c) to find the amplitude of the motion you need to know the time t. This can computed by dividing the equation for v with the equation for x and taking the arctan:

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3 years ago

if you drive your car at an average speed of 105km/h, how far (in km) will you go in 3hours 30minutes ?​

if you drive your car at an average speed of 105km/h, how far (in km) will you go in 3hours 30minutes ?