My teacher told that magnitude is the positive value of that quantity or the modulus of that quantity.
he also told that vector quantities have both magnitude and direction and scalar quantities have only magnitudes and hence are always positive.
However, gravitational potential energy is always negative except for being 0(at infinity)
But gravitational potential energy is also a scalar quantity.
So is there magnitude negative?
What I thought about it was that it's magnitude is negative.
Let's take an example of any vector quantity,say velocity.
If a body is moving with the velocity of -5m/s, that means it is moving with a speed of 5m/s in the direction opposite to the positive direction. And here, the body is covering 5 meters every second, though it's velocity is -5m/s.
But if a body has potential energy -40J, it does not mean that it has actual potential energy 40J but is in opposite direction, hence the magnitude should be negative
Please tell me that will the magnitude be positive or negative?