The ball's velocity at 2 sec is 30.4 m/s at
(below the horizontal)
Explanation:
The motion of the ball is a projectile motion, therefore it consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction
This means that:
- The horizontal velocity of the ball is constant, and it is given by

where
u = 35 m/s is the initial speed of the ball
is the angle of projection
Substituting,

- The vertical velocity is changing, and its value is given by

where
is the initial vertical velocity
is the acceleration of gravity (negative because it points down)
t is the time
At t = 2 s,

where the negative sign means that at t = 2 s, the vertical velocity points down.
Now we can find the magnitude of the ball's velocity at 2 sec:

While the direction is given by

Learn more about projectile motion:
brainly.com/question/8751410
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