Question

A projectile is fired with velocity u making angle θ with the horizontal. What is the change in velocity when it is at the highest point

• A. ucosθ
• B. u
• C. u sinθ
• D. (u cosθ – u)

Answer 1

Answer: (C)

u sinθ

Answer 2

Since horizontal component of velocity remain always constant therefore only vertical component of velocity changes.

Initially vertical component $u\sin\theta$

Finally it becomes zero. So change in velocity$= u\sin\theta$