Why is tension 0 at the top of a vertical circle?

Since the tension force cannot become a force that points away from the circle, it must be that the minimum of T is 0. Therefore, to determine the minimum velocity needed at the top of the circle for circular motion to still occur, it must be that T=0.

What is the tension in the string at the top of the circle?

= Newtons
the tension at the top of the circle is Ttop = Newtons. The corresponding tension at the bottom of the circle is Tbottom = Newtons.

Why is tension at end of string zero?

It equals zero because the weight isn’t moving so the acceleration is zero. This equals zero even if the acceleration is not zero. This is because we’re assuming the mass of the string is zero. The force exerted by the string on the weight, is called the “tension”.

Is tension greater at the top or bottom of the circle?

Answer: The tension in the string is greatest at the bottom of the circle, and lowest at the top. Answer: The tension in the string is greatest at the bottom of the circle, and lowest at the top.

What happens when tension is 0?

Zero tension is slack. A string or rope is often idealized as one dimension, having length but being massless with zero cross section.

At which point is the tension in the string the greatest?

bottom
tension is greatest at the bottom of the circular path. This is where the rope is most likely to break. It should make sense that the tension at the bottom is the greatest.

Why is tension greater at the bottom of a circle?

Tension and gravity are NOT “in the same direction”. The tension in the rope is always directed toward the middle of the circle. At the bottom, that means tension is UPWARD while gravitational force is directed DOWNWARD.

Is the tension in the string greater than?

The net force on the ball is, T−W=F⟹T=W+F T − W = F ⟹ T = W + F . Thus, the tension in the string is greater than the ball’s weight.

Why is the tension the same throughout the string?

The tension in the rope is constant if its force does not have to be used to accelerate anything else, including itself. Therefore, if it has negligible mass and is held taut between two points, the tension will be considered constant throughout.

Is the tension in string a greater than less than or equal to?

5. Fig. 8.5 shows two balls of equal mass moving in vertical circles. Is the tension in string A greater than, less than, or equal to the tension in string B if the balls travel over the top of the circle (a) with equal speed and (b) with equal angular velocity?

What is the tension difference between lowest and highest point in vertical circular motion?

At the highest point, weight will act downward and centrifugal force upward and there will be no tension (as stated). Hence, tension at lower point is 6mg and as discussed at uppermost point is zero.

Why is the tension at the top of the string zero?

Now if you don’t want any acceleration the you apply no force and the tension is 0 in the string. The tension may be zero at the top of the string. It depends on the speed of the mass being turned. At any given speed it will be less than at other part of the “orbit”. Too slow and it won’t get to the “top”.

Why does the string revolve in a circular motion?

If there is a tension in the string at topmost point then it will revolve because that tension is the centripetal force which causes it to make the circular motion. What if the tension is $0$ at the topmost point? No problem. The linear speed (which acts perpendicular to the centripetal force i.e. tension in this case) will keep it in motion.

Does tension point towards the center of the circle?

Tension does always point towards the center of the circle, but this does not mean it is the only force that has a radial component. The weight of the stone also has a radial component (except for at points where the rope is horizontal and the weight is completely tangent to the circle).

What is the meaning of no tension at the topmost point?

It means if no force to elongate, then no tension. Now taking the example you asked about. If there is a tension in the string at topmost point then it will revolve because that tension is the centripetal force which causes it to make the circular motion. What if the tension is $0$ at the topmost point?