2 years ago

At what time would the object reach a speed of 45 km/ hr? and what is the objects acceleration

Physics

1 answer:

olga nikolaevna [1]2 years ago

8 0

A car woulddddddd fr

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A truck is traveling east at 80 km/h. At an intersection 32 km ahead, a car is traveling north at 50 km/h. How long after this m

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The time elapsed when the vehicles are closest to each other is 20 min.

The given parameters:

Speed of the truck, u = 80 km/h
Distance, d = 32 km
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<h3>Principles of relative speed</h3>

The time elapsed when the cars are close to each other is calculated by applying the principles of relative speed.

$(V_r) t = d\\\\V_r^2 = 50^2 + 80^2\\\\V_r =\sqrt{50^2 + 80^2} \\\\V_r = 94.34 \ km/h$

$94.34 t = 32\\\\t = \frac{32}{94.34} \\\\t = 0.34 \ hr\\\\t \approx 20 \min$

Thus, the time elapsed when the vehicles are closest to each other is 20 min.

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2 years ago

At what time would the object reach a speed of 45 km/ hr? and what is the objects acceleration ​

At what time would the object reach a speed of 45 km/ hr? and what is the objects acceleration