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)u cosθ 

(b) u 

(c) u sinθ 

(d) (u cosθ – u) 

Answer 1

Correct option (c) u sinθ  

Explanation:

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

Initially vertical component usinθ 

Finally it becomes zero. So change in velocity = usinθ