You are Here: Home >< A-levels

# I don't get this

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. What is the apparent weight during take-off of an astronaut whose actual weight is 750N if the resultant upward acceleration is 5g?
They say the answer is 4500 by F=m(g+5g)
But why? T.T
5g is an upward acceleration while g is downwards why are they added??
2. (Original post by Posama)
What is the apparent weight during take-off of an astronaut whose actual weight is 750N if the resultant upward acceleration is 5g?
They say the answer is 4500 by F=m(g+5g)
But why? T.T
5g is an upward acceleration while g is downwards why are they added??
F = mg + ma.
F = apparent weight in newtons
m = the mass of the object
g is the acceleration due to gravity (9.8 meters per second squared on Earth's surface)
a is the acceleration of the object

On the answer they just factorised m so
F= m(g+a)
a = 5g
so m(g+5g)

See what you can do from there

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: September 27, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets