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3 years ago

Ball thrown upwards at velocity of 21.3 m/s what time will ball reach highest point

Physics

1 answer:

Nutka1998 [239]3 years ago

4 0

Recall that

${v_y}^2-{v_{0y}}^2=2a_y(y-y_0)$

At its highest point, the ball will have 0 vertical velocity, so that

$-\left(21.3\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.80\,\dfrac{\mathrm m}{\mathrm s^2}\right)y_{\mathrm{max}}$

$\implies y_{\mathrm{max}}=23.1\,\mathrm m$

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Answer:

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Explanation:

To find the values of the motor efficiency you use the following formula:

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traslation:

Pentru a găsi valorile eficienței motorului, utilizați următoarea formulă:

P_o: putere de ieșire = 864J / 0.5min = 864J / 30s = 28.8W

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Înlocuind aceste valori obțineți:

prin urmare, eficiența motorului este de aproximativ 96%

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