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dybincka [34]
2 years ago
9

What force acts on a projectile when it is launched in the air? A. gravity B. friction

Physics
2 answers:
Lorico [155]2 years ago
7 0
Friction I think cause gravity would be pulling it down
irga5000 [103]2 years ago
7 0
I believe the answer is A. Gravity.
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A 215-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope a
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Answer:

303.9481875 N

Explanation:

t = Time taken = 2 seconds

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I = Moment of Inertia

\alpha = Angular Acceleration

Torque

\tau=F\times r

\tau=I\times \alpha

\\\Rightarrow F\times r=I\times \alpha\\\Rightarrow F=\frac{I\times \alpha}{r}

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\omega=rev/s\times 2\pi\\\Rightarrow \omega=0.6\times 2\pi\\\Rightarrow \omega=3.76991\ rad/s

Angular acceleration

\alpha=\frac{\omega}{t}\\\Rightarrow \alpha=\frac{3.76991}{2}\\\Rightarrow \alpha=1.88495\ rad/s^2

I=\frac{1}{2}mr^2\\\Rightarrow I=\frac{1}{2}215\times 1.5^2\\\Rightarrow I=241.875\ kgm^2

F=\frac{I\times \alpha}{r}\\\Rightarrow F=\frac{241.875\times 1.88495}{1.5}\\\Rightarrow F=303.9481875\ N

The magnitude of the force to stop the merry-go-round is 303.9481875 N

3 0
3 years ago
Water has a very high specific heat capacity when compared to most other common materials. In fact, ethyl alcohol has a specific
AveGali [126]

Answer:

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5 0
3 years ago
Can someone please help me?
Alina [70]

Answer:

D would be it

Explanation:

cause none of the rest Makes sense to the book of the picture and I'm 100% sure =)

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Answer:  The volume of gas expands because of the decrease in pressure as he tries to exit the water body, therefore he must take necessary precaution.

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ie P1VI=P2V2

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