Aheavy steel ball is hung from a cord to make a pendulum. the ball is pulled to the side so that the cord makes a 5 ∘ angle with the vertical. holding the ball in place takes a force of 40 n . if the ball is pulled farther to the side so that the cord makes a 10 ∘ angle, what force is required to hold the ball?

The required force is calculated as 79.69 N

Solution:

As per the question:

Angle,

Force, F = 40 N

The angle after the ball is being pulled,

Now,

To calculate the required force:

The tension in the string can be calculated by considering the vertical component:

where

T = Tension in the cord

Now,

Now, after the cord is being pulled, the force exerted is given by:

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.