# Newton's Laws

1. Sep 25, 2010

### softball1394

1. A force acts on a 2 kg mass and gives it an acceleration of 3 m/s^2. What acceleration is produced by the same force when acting on a mass of (a) 1 kg? (b) 4 kg? (c) How large is the force?
Answers: (a) 6 m/s^2 (b) 1.5 m/s^2 (c) 6 N

2. -

3. I can't figure out what formula to use and, thus, how to show work. I'm in 11th grade and just start AP Physics two weeks ago. Let's just say I'm extremely confused. Thanks for the help! :)

2. Sep 25, 2010

### Staff: Mentor

What law relates force, mass, and acceleration?

3. Sep 25, 2010

### softball1394

I'm pretty sure it's Newton's second law.

4. Sep 25, 2010

### Staff: Mentor

Exactly! That's all you need to solve this problem.

5. Sep 25, 2010

### softball1394

so would it be...
f = m x a
f = 2 x 3
f = 6

(a)
f= m x a
6= 1 x a
a = 6

(b)
f= m x a
6= 4 x a
a= 1.5

(c)
f= 6N

Oh, wow. That was a lot easier than I thought ahah. Thanks!

6. Sep 25, 2010

### Staff: Mentor

Looks like you got it.

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