# Simple question for you

I am no science or physics major but this is my first quiz. I have this problem:
How much force must be applied to accelerate a 10,000-kg space shuttle to counter the Earth's gravitational acceleration of 9.8 meters per second square?
I took 9.8m/s^2 * 10,000 for 98,000 newtons.
Is that correct?
gnickg

Mentor
Yep.

Followup: the space shuttle accelerates at roughly 3g's at liftoff. What's the force? (careful, its a bit of a trick question)

Homework Helper
Originally posted by gnickg
I am no science or physics major but this is my first quiz. I have this problem:
How much force must be applied to accelerate a 10,000-kg space shuttle to counter the Earth's gravitational acceleration of 9.8 meters per second square?
I took 9.8m/s^2 * 10,000 for 98,000 newtons.
Is that correct?
gnickg

So far so good. Here's a conceptual helping hand: "g" is always called "acceleration due to gravity," but that's a misnomer (wrong name). An object only has an acceleration equal to "g" when it is in free fall in a vaccuum.

Think of "g" as the gravitational field intensity, and no matter what is happening, the gravitational force on something will be "mg" . A lot of people get confused by multiplying mass times an "acceleration" when the darn thing isn't going anywhere!