A basketball is thrown with a velocity of 20. m/s at an angle of 60.° above the horizontal. What is the horizontal component of its instantaneous velocity at the exact top of its trajectory? (Neglect air friction.)
A) 10. m/s
B) 20. m/s
C) zero
D) 17.3 m/s
E) 20. tan(60°) m/s

Question

Quizplus · Accepted Answer

At the top of its trajectory, the vertical component of the velocity is zero, but the horizontal component remains constant. The horizontal component is given by 20 m/s * cos(60°) = 10 m/s.

A Basketball Is Thrown with a Velocity of 20