3 years ago

Please could someone help me?

1 answer:

6 0

Answer:

I) 18.75 m/s

ii) for 10 second

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Answer:

All of these

Explanation:

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We have centripetal acceleration = $v^2/r = 2g$

So, v = $\sqrt{2gr}$

Now by equation of motion we have S= ut +0.5a $t^2$

S =displacement, u = initial velocity, a= acceleration and t = time

Here S = 2r and a = g , u = 0

$2r = 0+\frac{1}{2} *g*t^2$

$t = \sqrt{\frac{4r}{g} }$

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anyanavicka [17]

Answer: A

Explanation:

The acceleration of gravity is always 9.8 m/s^2 downwards, even if the velocity is 0 m/s.

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