You hold one end of a rope and pull horizontally with a force of 65N. Calculate the tension in the rope
if the other end is:
a) Tied to a wall.
b) Held by a friend who is pulling with a force of 65N in the opposite direction.
a) If the other end of the rope is tied to a wall, the tension in the rope is equal to the force you are applying, which is 65N.
b) If the other end of the rope is held by a friend who is pulling with a force of 65N in the opposite direction, the tension in the rope is the sum of the forces applied, which is 65N + 65N = 130N.