A projectile was fired at 35º above the horizontal.At the highest point in its trajectory its speed was 200 m/s.If air resistance is ignored,the initial velocity had a horizontal component of
A)zero
B)200 cos (35º)m/s
C)200 sin (35º)m/s
D)200/cos (35º)m/s
E)200 m/s

Question

Quizplus · Accepted Answer

At the highest point, the vertical component of velocity is zero, so the horizontal component remains unchanged and equals the speed at the highest point, which is 200 m/s.

A Projectile Was Fired at 35º Above the Horizontal