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

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

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

Answer :

To determine the force needed to accelerate a ball with a mass of 140 grams at [tex]\( 25 \, \text{m/s}^2 \)[/tex], you can use Newton's second law of motion, which is expressed by the formula:

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

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

Here are the steps to solve the problem:

1. Convert Mass to Kilograms:
The mass of the ball is given in grams. Since the standard unit for mass in the International System of Units (SI) is kilograms (kg), we need to convert the mass from grams to kilograms.

[tex]\[ \text{mass in grams} = 140 \, \text{g} \][/tex]

To convert grams to kilograms, divide by 1000:

[tex]\[ \text{mass in kilograms} = \frac{140}{1000} = 0.140 \, \text{kg} \][/tex]

2. Use the Formula [tex]\( F = ma \)[/tex]:
Now that we have the mass in kilograms, we can use the formula [tex]\( F = ma \)[/tex], where:

[tex]\[ m = 0.140 \, \text{kg} \][/tex]
[tex]\[ a = 25 \, \text{m/s}^2 \][/tex]

Multiply the mass by the acceleration:

[tex]\[ F = 0.140 \, \text{kg} \times 25 \, \text{m/s}^2 \][/tex]

3. Calculate the Force:
[tex]\[ F = 3.5 \, \text{N} \][/tex]

Therefore, the force needed to accelerate the ball at [tex]\( 25 \, \text{m/s}^2 \)[/tex] is [tex]\( 3.5 \, \text{N} \)[/tex].

The correct answer is:
[tex]\[ 3.5 \, \text{N} \][/tex]

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