# Homework Help: Question Related to Newton's Laws of Motion

1. Jul 21, 2011

### NeomiXD

1. A fully loaded Saturn V rocket has a mass of 2.92 x 10^6 kg. Its engines have a thrust of 3.34 x 10^7 N.

a. What is the downward force of gravity on the rocket at blast-off?
b. What is the unbalanced force on the rocket at blast-off?
c. What is the acceleration of the rocket as it leaves the launching pad?

Given:

m = 2.92 x 10^6 kg
F= 3.34 x 10^7 N

Required:

a. F?
b. F?
c. a

Solution:

?

how do you solve this question? Or can someone explain it in more detail. Also, when it says "Its engines have a thrust of 3.34 x 10^7 N" does the value represent the force applied upward?

2. Jul 21, 2011

### Staff: Mentor

Yes. That's the upward force. The downward force is just the weight due to gravity. What is the acceleration due to gravity g = _____ and how can you use that number with the mass of the rocket to get the force due to gravity?

3. Jul 21, 2011

### rock.freak667

Yes the thrust is the upward force. What is the downward force acting on the rocket? (This is what they are asking you in part a).