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A ball has a mass of 140 g. What is the force needed to accelerate the ball at [tex]$25 \, \text{m/s}^2$[/tex]?

(Formula: [tex]$F = ma$[/tex])

A. 3.5 N
B. 115 N
C. 165 N
D. 4.5 N

Answer :

To find the force needed to accelerate the ball, we use the formula:

[tex]\[ F = ma \][/tex]

where:
- [tex]\( F \)[/tex] is the force,
- [tex]\( m \)[/tex] is the mass of the object, and
- [tex]\( a \)[/tex] is the acceleration.

Step-by-step Solution:

1. Convert the mass from grams to kilograms:
The mass of the ball is given as 140 grams. To convert this to kilograms (since the standard unit of mass in physics is kilograms), we divide by 1000:

[tex]\[
m = \frac{140}{1000} = 0.14 \text{ kg}
\][/tex]

2. Use the given acceleration:
The acceleration is given as 25 m/s².

3. Substitute the values into the formula:

[tex]\[
F = ma = 0.14 \text{ kg} \times 25 \text{ m/s}^2
\][/tex]

4. Calculate the force:

[tex]\[
F = 3.5 \text{ N}
\][/tex]

So, the force needed to accelerate the ball at 25 m/s² is 3.5 N.

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