a/b. The ball has velocity vector at time
where is the ball's initial speed and
.
c. At its highest point, the ball has 0 vertical speed. This occurs when
d. Recall that
so that at its highest point,
e. This is just twice the time it takes for the ball to reach its maximum height, .
f. The ball's horizontal position after time is
so that after the time found in part (f), the ball has traveled
Answer:
<h2>1) There is no work done by the machine because</h2><h2>B) The object has not moved</h2><h2>2) There is no work done by the prisoner because</h2><h2>D) The prisoner does no work because the wall goes no distance</h2><h2>3) The kinetic energy when it is half the way down is</h2><h2>6.0 J</h2>Explanation:
1) As we know that the work done is the product of force and displacement
It is given as
so if the object is not displaced due to the force exerted by the object then the work done by the object must be ZERO
so correct answer is
B) The object has not moved
2) As we know that the work done is the product of force and displacement
It is given as
As we know that the wall is not displaced due to applied force so here work done by the prisoner must be zero
D) The prisoner does no work because the wall goes no distance
3) As we know by work energy theorem that work done by all forces is equal to change in its kinetic energy
So we will have
so we will have
now when cart moves half the distance then again using the same
Answer:
c. √2T
Explanation:
The period of a simple pendulum is given by;
Thus, the the new period will be √2T