At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots out of the bottle at an angle of 40o 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

Correct Answer: Option B

B. 4.7ms-1


R = Ucosθ x t

U = R/Cosθ×t

= 4.50/Cos40N.25

= 4.699m/s