By what factor has the acceleration changed due to gravity if the lengh is doubled and the period has changed by a factor of 5?

5 kilogram object is suspended from a string. The string is 4 meters long. What is the period of the object ting as a pendulum? Express your answer a number of seconds, omitting the unit.

A 0.013 kg rubber stopper attached to a 0.93 m string is swung in a circle. If the tension in the string is 0.35 N, what is the period of the stopper's rev.?

NASA has built a rotating device that allows to produce a maximal acceleration of 85m/s2. If the radius of this device is 15m what period must be obtained so that the maximal acceleration is reached?

NOTE: The answer of 85.715 rpm was given to me and was incorrect. What is the correct answer?

A 0.900 kg rock is tied to a string and whirled in a vertical circle with a 0.85 m radius and a frequency of rotation of 1.6 Hz. Assuming a constant velocity, determine the tension in the rope at the bottom of the circle. Round up your answer to the correct number of significant digits.

What is the force of the seat on a person ( 80kg) riding on a Ferris wheel with a radius of 10m with a velocity of 6.1 m/s at a) the top of the Ferris? b) the bottom of the Ferris wheel? c) what is the period of the Ferris wheel? d) what is the frequency?

On a certain moon, a pendulum with a length of 2 meters has a period of 10 seconds.  What is the acceleration of gravity (g) on this moon?

A fan is spinning trying to cool down people during a hot summers day. It has a period of 0.940 s and a diameter of 26.8 cm. It begins to slow down and it stops after 5.00 s. How many revolutions did the fan make between the time it started to slow down and when it stopped? a) 2.66 revb) 7.98 revc) 16.7 revd) 137 rev