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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 a ball with a mass of 140 grams at [tex]\(25 \, \text{m/s}^2\)[/tex], we can use the formula for force:

[tex]\[ F = m \times a \][/tex]

where [tex]\( F \)[/tex] is the force in newtons (N), [tex]\( m \)[/tex] is the mass in kilograms (kg), and [tex]\( a \)[/tex] is the acceleration in meters per second squared ([tex]\(\text{m/s}^2\)[/tex]).

Step 1: Convert the mass from grams to kilograms

The mass is given as 140 grams. To convert grams to kilograms, we divide by 1000:

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

Step 2: Use the formula to calculate the force

Now that we have the mass in kilograms, we can use the formula:

[tex]\[ F = m \times a \][/tex]

where

[tex]\[ m = 0.14 \, \text{kg} \][/tex]

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

Substitute these values into the formula:

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

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

Therefore, the force needed to accelerate the ball is [tex]\(3.5 \, \text{N}\)[/tex]. So, the correct answer to the question is [tex]\(3.5 \, \text{N}\)[/tex].

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