Question

The metric unit of force is the Newton (N), which is kg∙m/s^2. Convert 10 mg∙cm/s^2 to Newtons. Be careful when working with units.

A. 1 x 10^-2 N

B. 1 x 10^-5 N

C. 1 x 10^-6 N

D. 1 x 10^-7 N

***I fee like it is D. 1 x 10^-7 N, but I'm not too sure... can u pls explain also?? and how to get to it?? i'm not 100% sure :) thx :)

Answer 1

two things you need to do here:

1) convert mg to kg

2) convert cm to m

Answer 2

to convert mg to kg, use the two equalities

1000 mg = 1 g
1000 g = 1 kg

to convert from cm to m, use the equation

100 cm = 1 m

Answer 3

okay I'm following :)

Answer 4

since we have a s^2 in the denominator of each, we can ignore it for now

Answer 5

ok

Answer 6

so we want to go from

mg∙cm

to

kg∙m

Answer 7

10 mg∙cm * (1 g/1000 mg) * (1 kg/1000 g)

what does this give you?

Answer 8

idk, i always get confused on these :(

Answer 9

ignore the units for now

Answer 10

focus on the numbers only

Answer 11

so i have this??