Based on the graph, how would you describe the motion of the object?

Given graph showing the relation between Velocity and time. And it is clear from the graph that the "Velocity is constant with respect to the time".The velocity of the graph is a function of time is equal to the acceleration.Horizontal slope (Zero slope) in the graph implies zero acceleration

Therefore the given graph gives the acceleration is zero, Also We calculate the acceleration from the mathematical relations results in Zero acceleration.

The work done by the force of gravity on the sphere from AA to BB is W=0.53 J.

Explanation:

The length of the string is 0.6 m.

We can define the work done by the force of gravity as:

The integral above is a integral of a vector product between the force of gravity and the displacement of the pendulum (dy).

In this case, we can simplify that because the force of gravity acts only in the y-axis, so the only displacement that afects our work is the displacement done in that direction (h).

We can calculate h as

The force of gravity is

Then the work done by the force of gravity is: