Mechanics vectors question

I'm stuck on part 1. I hate to move forward without completing something and i'm sure it's obvious, so can anyone help me? I'm absolutely awful at mechanics :frown:

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Reply 1

the bear

If the box does not move the forces must be equal and opposite...

Reply 2

Indeterminate

Original post by jazzie14

I'm stuck on part 1. I hate to move forward without completing something and i'm sure it's obvious, so can anyone help me? I'm absolutely awful at mechanics :frown:

Hint:

If the particle didn't move, 2 equal forces must have been applied in opposite directions. It would've moved if one was greater than the other.

Reply 3

Noble.

There's no actual working out you need to do, but you know he is pulling on it with a force of 600N and nothing is moving - so what can you conclude about the resultant force?

Reply 4

ztibor

Original post by jazzie14

I'm stuck on part 1. I hate to move forward without completing something and i'm sure it's obvious, so can anyone help me? I'm absolutely awful at mechanics :frown: