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
Explanation
R = Ucos(theta) x t
U = (frac{R}{Cos theta times t})
= (frac{4.50}{Cos40N.25})
= 4.699m/s