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Temka [501]
3 years ago
5

How to solve for average speed

Physics
1 answer:
borishaifa [10]3 years ago
4 0

The Average speed can be found by dividing the total traveled by the amount of time it took to travel that distance.

For example, if it took you 10 hours to travel 100 miles, your average speed is the amount of miles you traveled in 1 hour. Simplify.

100/10 = 10/1

Your average speed is 10 miles per hour.

~

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An object is thrown straight up with an initial velocity of 10 m/s, and there is an air resistance force causing an acceleration
lana [24]

Answer:

Vf= 7.29 m/s

Explanation:

Two force act on the object:

1) Gravity

2) Air resistance

Upward motion:

Initial velocity = Vi= 10 m/s

Final velocity = Vf= 0 m/s

Gravity acting downward =  g = -9.8 m/s²

Air resistance acting downward = a₁ = - 3 m/s²

Net acceleration = a = -(g + a₁ ) = - ( 9.8 + 3 ) = - 12.8 m/s²

( Acceleration is consider negative if it is in opposite direction of velocity )

Now

2as = Vf² - Vi²

⇒ 2 * (-12.8) *s = 0 - 10²

⇒-25.6 *s = -100

⇒ s = 100/ 25.6

⇒ s = 3.9 m

Downward motion:

Vi= 0 m/s

s = 3.9 m

Gravity acting downward =  g = 9.8 m/s²

Air resistance acting upward = a₁ = - 3 m/s²

Net acceleration = a = g - a₁  =  9.8 - 3  = 6.8 m/s²

Now

2as = Vf² - Vi²

⇒ 2 * 6.8 * 3.9 = Vf² - 0

⇒ Vf² = 53. 125

⇒ Vf= 7.29 m/s

8 0
3 years ago
Which law states that absolute zero cannot be reached?
Lera25 [3.4K]
Assuming you mean temperature

Answer: The third law of thermodynamics
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If the torque required to loosen a nut that
liraira [26]

Explanation:

τ = Fr

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F ≈ 113 N

7 0
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Who published the first journal of experimental psychology?
raketka [301]

Answer:

Who published the first journal of experimental psychology?

American Psychological Association published the first journal of experimental psychology.

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6 0
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13. when a source of sound and a listener are in motion relative to<br> each other
dybincka [34]

Answer:

and person at rest hears sound at a different frequency than a person moving.

Explanation:

6 0
3 years ago
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