A vector has both magnitude and direction. The magnitude is always positive, by convention, but this is not cast in stone. So you can have in your case a positive magnitude with a direction 257.31 degrees, which is the same as a positive magnitude 77.31 degrees in quadrant III, but the first way is more conventional. One could also say a negative magnitude at 77.31 degrees, in which case the negative sign implies a 180 degree reversal.
So there are many choices, and you seem to have a good handle on this.
Friction can be negative or positive depending on the direction in which your measures are positive.
Yes, acceleration can be positive and negative because acceleration is a vector. It has both direction and magnitude. The direction is what makes it positive or negative. Negative acceleration is usually called deceleration.
When you multiply a positive number by a negative number, the result is always negative. This is because the negative sign indicates a reversal in direction or value. For example, if you multiply 5 (positive) by -3 (negative), the result is -15, reflecting that the product is in the opposite direction of the positive number.
The 'speed' of a body cannot be negative. But if you are stating the 'velocity' then it can be negative. Negative velocity means it is going opposite to the direction that you decided to call the positive direction.
If you define one direction (for example, north) as positive, then the opposite direction is negative.
Friction can be negative or positive depending on the direction in which your measures are positive.
You can consider any direction as positive, and the opposite direction as negative. However, in this case it is customary to call a gain "positive", and a loss "negative".
The resultant force of a number of balanced forces acting on a body is zero force. The reason is because any force in one direction is always canceled out by another equal force but in the opposite direction. This is what is meant by balanced forces. For every force in the positive direction, there is also an equal negative force in the negative direction. So the forces all add up to Zero. No net force at all.
The resultant force of a number of balanced forces acting on a body is zero force. The reason is because any force in one direction is always canceled out by another equal force but in the opposite direction. This is what is meant by balanced forces. For every force in the positive direction, there is also an equal negative force in the negative direction. So the forces all add up to Zero. No net force at all.
Yes, acceleration can be positive and negative because acceleration is a vector. It has both direction and magnitude. The direction is what makes it positive or negative. Negative acceleration is usually called deceleration.
Velocity can have positive or negative value depending on the direction of the change in position. Positive velocity indicates motion in one direction, while negative velocity indicates motion in the opposite direction.
In a coordinate system, positive force is typically defined as acting in the direction of the positive axis. For example, in a one-dimensional system, positive force would be in the positive direction of the axis, while negative force would be in the negative direction.
Acceleration is positive when an object is speeding up in the positive direction (e.g., increasing velocity), and negative when the object is slowing down in the positive direction or moving in the negative direction (e.g., decreasing velocity). The sign of acceleration depends on the direction of the change in velocity relative to the direction of motion.
In physics, displacement can be either positive or negative depending on the direction of the movement. Positive displacement indicates movement in one direction, while negative displacement indicates movement in the opposite direction.
The electric field points from positive to negative.
In a given system, the electric field direction changes from positive to negative when the source of the electric field changes its charge from positive to negative.
Take east to be the positive direction, +11 lb. Take west to be the negative direction, -17 lb. Resultant (net force) = +11 lb + (-17 lb) = -6 lb, or 6 lb west.