If Mrs. Hankinson slides a 500 g book with 0.5 N of force, what is the acceleration of the book?

Question

F = ma

a
0.001 m/s2
b
1000 m/s2

c
500 m/s2

d
250 m/s2

Question 28
The mass number of an element is equal to:

a
the number of electrons
b
the number of protons and electrons
c
the number of protons and neutrons
d
the number of protons.

Answer 1

To find the acceleration of the book using Newton's second law \( F = ma \):

1. We have a force \( F = 0.5 , \text{N} \).
2. The mass \( m = 500 , \text{g} = 0.5 , \text{kg} \) (since 1000 g = 1 kg).

Using the formula \( a = \frac{F}{m} \):

\[ a = \frac{0.5 , \text{N}}{0.5 , \text{kg}} = 1 , \text{m/s}^2 \]

So the correct answer for the acceleration of the book is not listed in your options.

For Question 28: The mass number of an element is equal to the total number of protons and neutrons in the nucleus. Therefore, the correct answer is:

c the number of protons and neutrons.