High School

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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 :

First, we convert the mass from grams to kilograms. Since there are 1000 grams in a kilogram:

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

The acceleration is given as:

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

Now, using Newton's second law of motion:

[tex]$$
F = ma
$$[/tex]

Substitute the known values:

[tex]$$
F = 0.14 \, \text{kg} \times 25 \, \text{m/s}^2 = 3.5 \, \text{N}
$$[/tex]

Thus, the force required to accelerate the ball is [tex]$\boxed{3.5 \, \text{N}}$[/tex].

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