The students on the right are applying a force of 100 N to the right. This is shown by the red arrow. The students on the left a
re applying a force of 100 N to the left. This is shown by the blue arrow. A student on the blue team loses balance and lets go of the rope. What is the most likely effect of this change?
A. The rope will move to the right, in the direction of the net force.
B. The rope will move to the left, in the direction opposite to the net force.
C. The rope will move to the left, in the direction of the net force.
D. The rope will move to the right, in the direction opposite to the net force.
A. The rope will move to the right, in the direction of the net force.
B. The rope will move to the left, in the direction opposite to the net force.
C. The rope will move to the left, in the direction of the net force.
D. The rope will move to the right, in the direction opposite to the net force.
2 answers:
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Answer:
option (a) 0.61 s
Explanation:
Given;
Time taken by the ball to reach the ground = 0.50 s
Let us first calculate the distance through which the ball falls on the ground
from the Newton's equation of motion, we have
where,
s is the distance
a is the acceleration
t is the time
here it is the case of free fall
thus, a = g = acceleration due to gravity
u = initial speed of the ball = 0
on substituting the values, we get
or
s = 1.225 m
Now,
when the elevator is moving up with speed of 1.0 m/s
the initial speed of the ball = -1.0 m/s (as the elevator is moving in upward direction)
thus , we have
or
or
4.9t^2 - t - 1.225 = 0
or
t = 0.612 s
hence, the correct answer is option (a) 0.61 s