Answer:
A
B
C
Explanation:
A)
The tension is 0 because there is no net force.
B)
The tension is once again 0 because the acceleration is 0 which means there is no net force.
C)
Ma=F
50 kg x 5 m/s^2=F
250 N= F
Answer:
a. 0 N
b. 0 N
c. 250 N
Explanation:
(a) If the box is at rest, that means that there is no acceleration since the net force acting on the block is 0.
We know that the acceleration must be 0 m/s², so by using Newton's 2nd Law:
We can calculate the tension force since we have the mass and acceleration of the box.
The force of tension in the rope is 0 N if the box is at rest.
(b) If the box is moving at a constant velocity, this means that there are no unbalanced forces acting on the box. Therefore, since the net force is 0 the acceleration is also 0 m/s².
Since this is the same scenario as before, we know that the tension in the rope is 0 N if the box moves at a constant velocity of 5.0 m/s.
(c) Now we are given the acceleration of the box, so we can calculate the tension force using Newton's 2nd Law:
The tension in the rope if the box has an acceleration of 5.0 m/s² is 250 N. Notice that the velocity does not affect the force.
