Question #6417142Single Choice
Physics
Question
As shown in the figure, a metal ball is released from a helicopter flying horizontally at a speed of 20 m/s. Before hitting the ground, the ball passes through two points, A and B. At point A, the angle between the ball's velocity direction and the horizontal is 45°, and at point B, the angle is 60°. Neglecting air resistance and taking g=10 m/s², which of the following statements is incorrect?
Options
A
The time taken for the ball to fall from release to point B is 3.464 s
B
The time interval between the ball passing through points A and B is 1.464s
C
The height difference between points A and B is 30 m
D
The height difference between points A and B is 40 m
Answer & Analysis
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