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3 years ago

What speed is a car going if it takes 2 hours to go 80 miles?

2 answers:

8 0

Okay. If a car takes 2 hours to go 80 miles, the car is going 40 miles an hour. All you have to do is 80/2 in order to get your answer, because you do distance divided by time to find the speed.

user100 [1]3 years ago

4 0

The car would be moving at 40 miles per hour.

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4 years ago

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Rina8888 [55]

1) Forces acting on your body: force of gravity and normal reaction

2) Due to Newton's second law, N = mg

Explanation:

When you sit on the computer, there are only two forces acting on you:

The force of gravity, acting downward, of magnitude $W=mg$ , where m is your mass and $g=9.8 m/s^2$ is the acceleration due to gravity, downward
The normal reaction exerted by the chair on you, $N$ , acting upward

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4 years ago

Explain the energy changes involved when a positive charge moves because of a nearby, negatively charged object. use the terms e

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3 years ago

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A 1470-kilogram truck moving with a speed of 27.0 m/s runs into the rear end of a 1010-kilogram stationary car. If the collision

Gre4nikov [31]

Answer:

$\Delta KE = 218.375\ kJ$

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Mass of the truck, M = 1470 Kg

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mass of car, m = 1010 Kg

initial speed of car, u' = 0 m/s

Final speed, V = ?

Using conservation of momentum

$Mu = (M+m) V$

$1470\times 27 = (1470 + 1010 ) V$

$V = 16\ m/s$

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$\Delta KE = \dfrac{1}{2} Mu^2 - \dfrac{1}{2}(M+m)V^2$

$\Delta KE = \dfrac{1}{2}\times 1470\times 27^2 - \dfrac{1}{2}\times (1470 + 1010)\times 16^2$

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