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Karo-lina-s [1.5K]
3 years ago
5

A car travels 45 km north. It then turns around and travels 30 km south. What is the car's displacement?

Physics
1 answer:
natka813 [3]3 years ago
4 0
If the ration supplementary angle is 11:7,find the measure of the larger angle larger angle?
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How does the mass affect the speed as it rolls down a slope?
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Which of the following best defines mass?
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A toy cannon launches a 46-g golf ball straight up into the air with a kinetic energy of 6.8 J. What must the
Shkiper50 [21]

Answer : The correct option is, (C) 17 m/s

Explanation :

Formula used :

K.E=\frac{1}{2}mv^2

where,

K.E = kinetic energy = 6.8 J

m = mass of object = 46 g = 0.046 kg    (1 kg = 1000 g)

v = velocity

Now put all the given values in the above formula, we get:

K.E=\frac{1}{2}mv^2

6.8J=\frac{1}{2}\times 0.046kg\times v^2

6.8kg.m^2/s^2=\frac{1}{2}\times 0.046kg\times v^2

v=17.19m/s\approx 17m/s

Therefore, the ball's velocity be as it leaves the cannon is, 17 m/s

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3 years ago
The beginning of the Phanerozoic is marked by what occurrence
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