Question

$\mathbb{ \ \ Q\ U\ E\ S\ T\ I\ O\ N\: \: }$
When you whirl a small rubber stopper on a cord in a vertical circle, you find a critical speed at the top for which the tension in the cord is zero. At this speed. the force of gravity on the object 1S itselfisufficient to supply the necessary centripetal force. How slowly can you swing a 15-g stopper like this so that It will just follow a circle with a radius of m?​

Answer 1

Answer:

this condition occurs when centripetal acceleration equals the acceleration of gravity

so

v^2 / r = g

v^2 / 1.5 = 9.8

v^2 = 14.7

v = 3.8 m/s

this is the minimum speed of the stopper at the top of the circle

1.

A body in uniform circular motion experiences acceleration that is constant in magnitude.

2.

Centripetal acceleration is in a direction tangential to the path of the object in motion.

3.

At a constant speed, the centripetal acceleration of an object in uniform circular motion is inversely proportional to the orbital radius, yet, at a constant period of revolution, the centripetal acceleration is directly proportional to the orbital radius.

4.

The centrifugal force on an object in uniform circular motion is, as required by Newton’s first law of motion, directed toward the centre of the circle.

5.

Centripetal force is a fundamental force of nature that applies to all objects, both natural and human-made, in circular motion.

6.

It is possible for static friction to be the sole force producing centripetal acceleration in a moving object.

7.

The centripetal and centrifugal forces are an action-reaction pair of forces for an object in uniform circular motion.

8.

Perturbations in the orbits of planets or other heavenly bodies can be used to locate additional such bodies.

9.

The magnitude of your weight, as calculated from F = mg, yields a much smaller value than the magnitude of the force of gravity between you and Earth, as calculated from p12ch3_files/i0100000.jpg.

10.

The International Space Station is an example of an artificial satellite.

11.

As the radius of the orbit of a satellite in uniform circular motion around a central body increases, the speed of the satellite decreases.

hope it helps

Answer 2

Answer:

√(9.8) m is the answer !!