3 years ago

The vertical velocity?

Physics

1 answer:

9966 [12]3 years ago

5 0

Answer:

its b i think if im wrong ill correct it later ;)

Explanation:

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A bird sitting high in a tree is an example of an object with what type of energy?

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It has potential energy because of its position.

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if 130N centripetal force is needed to keep a 0.45kg ball that is attached to a string that is 0.7m long to complete 5 full rota

andrezito [222]

Answer:

centripetal acceleration of the ball is 6.9 m/s/s

tangential speed of the ball is 2.2 m/s

Explanation:

As we know that ball complete 5 rotations in 10 seconds

so frequency of rotation of ball is given as

$f = \frac{5}{10} = 0.5 Hz$

now we know that angular frequency is given as

$\omega = 2\pi f$

$\omega = 2(\pi)(0.5)$

$\omega = \pi rad/s$

Now centripetal acceleration is given as

$a_c = \omega^2 R$

$a_c = \pi^2 (0.7)$

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now the velocity of the ball at this angular frequency is given as

$v = R\omega$

$v = 0.7 (\pi)$

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1. combustion

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When a cyclist moves downhill without pedalling, what type of energy does he gain?

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He is gaining kinetic energy and losing potential energy

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