Question
Question: Find the average velocity of a projectile between the instant it crosses one third the maximum heigh...
Find the average velocity of a projectile between the instant it crosses one third the maximum height. It is projected with u making an angle θ with the vertical.
A
ucosθ
B
u
C
u sin θ
D
u tan θ
Answer
u sin θ
Explanation
Solution
c)
Sol. Note carefully the vertical velocities at the same height are in opposite directions and therefore their average sum = 0. It is horizontal velocity which is uniform and hence vav = u sin θ (=u).
