College

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

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

Next, use the formula for force:

[tex]$$
F = m \cdot a,
$$[/tex]

where [tex]$m$[/tex] is the mass and [tex]$a$[/tex] is the acceleration. Plug in the values:

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

Perform the multiplication:

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

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