Question

What is the acceleration of this object? The object's mass is 60 kg.

Answer 1

3.3 m/s2

i took the test ;)

Answer 2

First determine the net force. Let's say the downwards force is negative and the upwards force is positive.
Since the forces act in opposite directions, the net force would be:
400N - 600N = -200N

Since I said negative is downwards, this translates to the net force being 200N downwards.

Force = mass*acceleration
200N = 60kg * acceleration
acceleration = 3.33 m/s^2