Option b is the correct one.
The negative sign before the force gives it a direction whether it's opposite to another force.
Hope this helps!
It’s that or Fn Im pretty sure
Answer:
I guess the answer was d.The current at P is greater than the current at Q...
The calculated total mechanical energy will reduce if the oscillation is not perpendicular to the photogate.
<h3>Mechanical energy at the lowest position of the pendulum</h3>
The mechanical energy at the lowest position of the pendulum is calculated as follows;
<h3>When the direction of the motion changes</h3>
let the velocity of the pendulum = vsin(θ)
when the velocity is perpendicular = vsin(90) = v
At any direction different from perpendicular direction, the mechanical energy reduces by;
Thus, the calculated total mechanical energy will reduce if the oscillation is not perpendicular to the photogate.
Learn more about mechanical energy here: brainly.com/question/24443465