Question

A book, that has a mass of 0.5 grams, is pushed across a table with a force of 20 newtons. What is the acceleration of the book?

Answer 1

As shyluke89 stated in their response above,

the correct answer (for PF students) is 40 m/s²

or (as stated above) 4•10⁴ m/s²

I hope this was helpful, and a little less confusing!

(✿◠‿◠)

Answer 2

`4\cdot 10^4 m/s^2`

Step-by-step explanation:

The acceleration of an object is given by Newton's second law:

`a=(F)/(m)`

where

F is the net force applied on the object

m is the mass of the object

For the book in the problem, we have:

`m=0.5 g =5\cdot 10^(-4) kg` is the mass

`F=20 N` is the force applied

Substituting into the formula, we find the acceleration:

`a=(20 N)/(5\cdot 10^(-4) kg)=4\cdot 10^4 m/s^2`