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notka56 [123]
3 years ago
15

Jack is falling down the hill at a speed of 12 m/s. If Jack has a mass of 45 kg, what is his kinetic energy?

Physics
1 answer:
Troyanec [42]3 years ago
5 0

Answer:

K=3240J

Explanation:

speed=12m/s

m=45kg

K=½mv²

K=½(45•144)J=3240J

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How high would a projectile go if it was launched from ground level with an initial speed of 26 m/s at an angle of 30 degrees ab
tigry1 [53]

Answer:

Vy = 26 m/s sin 30 = 13 m/s      vertical speed

t = Vy / a = 13 m/s / 9.80 m/s^2 = 1.33 sec     time to reach Vy = 0

H = Vy t + 1/2 g t^2

H = 13 m/s * 1.33 sec - 1.33^2 * 9.8 / 2 m = 8.62 m

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Why don't atoms get too close?
Lera25 [3.4K]

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3 0
2 years ago
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Ivahew [28]

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5 0
3 years ago
Impulse equals?<br> A) momentum x velocity<br> B) momentum x time<br> C) mass x velocity
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7 0
2 years ago
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How far does a car travel in 90 seconds if it’s traveling 55 m/s? Show equation
podryga [215]

You just said the car is traveling at the speed of 55 m/s.  If I understand this  correctly, that means the car will cover:

55 meters in the first second,

55 meters in the 2nd second,

55 meters in the 3rd second,

55 meters in the 4th second,

55 meters in the 5th second,

.

.

.

55 meters in the 87th second,

55 meters in the 88th second,

55 meters in the 89th second, and

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That's 55 meters 90 times.  If you just move these words around a little bit, it says "90 times 55 meters" . . . a pretty simple arithmetic problem.

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I get <em>4,953 meters</em>.  You should check me on this.

8 0
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