Question

A projectile is fired with velocity of 10 m/s at 60° with y-axis, it's velocity at maximum height: A) 8.66 m/s B) 7.07 m/s C) 10 m/s D) 5 m/s​

Answer 1

Answer:

B

Explanation:

u = 10m/s

Here the angle Ф is given to be 60° it's with y-axis → 30° with x- axis.

Now it can be solved to its component.

At the highest point the y- component will be 0.

So the velocity of the object now will be depending

upon x- component → u cos Ф

                                  → 10 cos 30°

                                  → 5 √3 = 7.07 ( Answer)