Question

A 30 N force is applied to an object, which then accelerates at 3 m/s2. What

is the mass of the object?
O
A. 10 kg
O B. 3.0 kg
O C. 90 kg
O D. 33 kg

Answer 1

10kg

Step-by-step explanation:

The information we have is:

Force:
`F=30N`

acceleration:
`a=3m/s^2`

What we need to know is the mass of the object. For this we can use Newton's second law:

`F=ma`

Where F is the Force applied, m is the mass of the object, and a is its acceleration.

from this equation we clear for the mass
`m`:

`m=(F)/(a)`

and we substitute the known values:

`m=(30N)/(3m/s^2)=10kg`

The mass of the object is 10kg

Answer 2

the mass of the object is 10 kg

Step-by-step explanation:

In the image attached, we can see the free body diagram and using the newton's second law of movement, we will have one equation with one unknown value (the mass of the object).

where:

m [kg]

a [m/s^2]

F [N] or [kg*m/s^2]