Question

A tennis ball is tossed upward with a speed of 3.0\,\dfrac{\text m}{\text s}3.0 s m ​ 3, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. We can ignore air resistance. What is the velocity of the ball 0.40\,\text s0.40s0, point, 40, start text, s, end text after the toss?

Answer 1

The velocity of the ball after 0.4 s is 1 m/s in downwards direction

Explanation:

Given:

A tennis ball is tossed upward with a speed of 3 m/s

To find out:

The velocity of the ball after 0.4 seconds

Solution:

The initial velocity of the ball u = 3 m/s

Time t = 0.4 seconds

Using the first equation of motion

$v=u+at$

Here,

u = 3 m/s

t = 0.4 s

a = -g = -10 m/s²

Velocity after time 0.4 seconds

$v=3-10\times 0.4$

$\implies v=3-4=-1$ m/s

Negative sign indicates that the velocity is on downwards direction

Hope this answer is helpful.

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