At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots...

WAEC 2016

At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots out of the bottle at an angle of 40^o to the horizontal and travels a horizontal distance of 4.50m in 1.25s. Calculate the initial speed of the cork.

A. 4.2ms^-1
B. 4.7ms^-1
C. 5.6ms^-1
D. 7.1ms^-1

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Correct Answer: Option B

Explanation

R = Ucos\(\theta\) x t

U = \(\frac{R}{Cos \theta \times t}\)

= \(\frac{4.50}{Cos40N.25}\)

= 4.699m/s

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At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots...

Correct Answer: Option B

Explanation

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