Question

Help!!! This is worth 30 points pls pls pls help help help

Answer 1

Answer:

The tennis ball is moving 6m/s.

Explanation:

displacement(s) = 0.5 m

intial velocity(u) = 4 m/s

acceleration(a) = 10 m/s²

As we know,

2as = v²-u²

or, 2 ×10 × 0.5 = v²-4²

or, 10 = v²-16

so, v² = 36

so, v (final velocity) = 6 m/s

Answer 2

• Initial velocity=u=4m/s
• Acceleration=a=10m/s^2
• Distance=s=0.5m
• Final velocity=v=?

Apply third equation of kinematics

$\\ \tt\hookrightarrow v^2=u^2+2as$

$\\ \tt\hookrightarrow v^2=4^2+2(10)(0.5)$

$\\ \tt\hookrightarrow v^2=16+10$

$\\ \tt\hookrightarrow v^2=26$

$\\ \tt\hookrightarrow v\approx 5m/s$