Question

A tennis player applies 20 N of force to a tennis ball, causing it to accelerate at a rate of 40 m/s2. Find the mass of the tennis ball.
f the tennis ball.
a. 0.5 kg
b. 0.2 kg
c. 0.5 kg
d. 0.2 kg

Answer 1

Answer:

$m=0.5kg$

Explanation:

Using the formula for Newton's Second Law...

· $F=ma$

• $F=$ force
• $m=$ mass of object the force is acting on
• $a=$ resultant acceleration

Given:

$F=20N$

$m=$ ?

$a=40\frac{m}{s^2}$

Equation:

$F=ma$

Work:

$F=ma\\(20)=m(40)\\\frac{20}{40}=\frac{40m}{40} \\m=0.5kg$

Key Takeaway:

The key concept here is understanding that objects with a higher mass will tend to keep their momentum. As mass increases, inertia increases and thus, the amount of force required to move something with a large mass compared to a smaller mass is increased as well.

Answer 2

Answer:

the answer is 0.5kg

Explanation: