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Naya [18.7K]
3 years ago
6

You serve a volleyball with a mass of 2.5 kg. The ball leaves your hand with a speed of 23 m/s. What is the kinetic energy of th

e ball?
Physics
1 answer:
Zarrin [17]3 years ago
8 0

Answer:

661.25, I believe!

Explanation:

KE = (1/2)(2.5)(23)^2

KE=(1.25)(529)

KE= 661.25

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Answer:

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(b) 52 N

Explanation:

Given Data

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The component of F perpendicular to the ramp is Fy.

(a)  

Let the +x-direction be up the incline and the +y-direction by the perpendicular to the surface of the incline.  

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Solve for F:  

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(b) Resolve r into its y-component from Pythagorean theorem:

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   Substitute for F from part (a):

     Fy = (104 N) (sin 30°)  

          = 52 N  

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