2 years ago

2- A car spends two hours driving at 20 km/h, and then an hour driving at 50 km/h.

Physics

1 answer:

mrs_skeptik [129]2 years ago

8 0

The answer is D. 30 km/h

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Which of the following is the best example of kinetic energy? A. A bowling ball rolling toward the pins B. A horse standing in a

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Car 1 goes around a level curve at a constant speed of 65 km/h . The curve is a circular arc with a radius of 95 m . Car 2 goes

Arte-miy333 [17]

Answer:

The radius of the curve that Car 2 travels on is 380 meters.

Explanation:

Speed of car 1, $v_1=65\ km/h$

Radius of the circular arc, $r_1=95\ m$

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We need to find the radius of the curve that Car 2 travels on have to be in order for both cars to have the same centripetal acceleration. We know that the centripetal acceleration is given by :

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According to given condition,

$\dfrac{v_1^2}{r_1}=\dfrac{v_2^2}{r_2}$

$\dfrac{65^2}{95}=\dfrac{130^2}{r_2}$

On solving we get :

$r_2=380\ m$

So, the radius of the curve that Car 2 travels on is 380 meters. Hence, this is the required solution.

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The main component of all computer memory is

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