Question

PLEASE HELP


How many newtons of force would 200 grams apply?
What would be the mass of an object that weights 7 N on earth?
If an object weights 450 N. How much does it weight in pounds?

Answer 1

In the first question we're talking about weight (i.e. force of gravity). We need to use F=ma. The mass is 200 g = 0.2 kg, and the acceleration (due to gravity) is 9.8 m/s^2. That makes the force 1.96 N.

Try the second question on your own - it also uses F=ma. The last question is a conversion question, so you'll need to find the mass in kg first (again using F=ma) and convert that to pounds!

Answer 2

713.8013490845498 for the second one

Answer 3

@matt101 but the last one really do not know

Answer 4

How did you get that answer?

Answer 5

i got the answer by formula m=dv where Mass=Density x Volume

Answer 6

but not really sure if it is right

Answer 7

Ok

Answer 8

We're talking about forces here so density and volume are not involved. The question gives you the force (7 N), and you already know the acceleration from the previous question (9.8 m/s^2). You can use this information to find the mass (m) using F = ma!

Answer 9

okay so the answer would be 39.2?

Answer 10

\[F = ma\]\[7=m(9.8)\]\[m=0.714\]
So the mass would be 0.714 kg.

Try finding the mass in the last question.

Answer 11

oh okay

Answer 12

thats the second one or last one?

Answer 13

The second one - you try the last one!

Answer 14

okay one sec

Answer 15

multiply 450 N by 0.167, and you get 75.15 N ?

Answer 16

is that right?

Answer 17

@matt101

Answer 18

Where's the 0.167 coming from?

Answer 19

idk im not really good at this

Answer 20

450 N is your force, 9.8 m/s^2 is your acceleration. Plug those numbers into F = ma to find your mass. Same as I did above for the second question.