Physics Answers

You whirl a 32 gram rubber stopper on a string in a horizontal circle above your head. The string has length 82 cm and completes 5 revolutions in 4.1seconds. What is the speed of the stopper in m/s? What is the tension on the string in newtons?

A fly wheel of radius 2.28 cm is accelerated from rest at 14.2 rad/s square until its rotational speed is 276 rpm. What is the tangential acceleration of a point on the rim of the flywheel during its spin up process. What is the radial acceleration of this point when the flywheels is spinning at full speed?

A 50 kg object moves at 50 m/s around a circular path of radius 10m. What centripetal force is needed to keep it in its orbit? What is the centripetal acceleration of the object?

A 980 kg test car travwls around a circular track with a radius of 625 meters. If the magnitude of the centripetal force is 2433 N, what is the car's speed in m/s. What is the car's centripetal acceleration.

A flywheel with a radius of 0.3 m starts from rest and accelerates with a constant angular acceleragion of 0.60 rad/s square. Calculate the magnitude of the tangential acceleration, radial acceleration and the resultant acceleration of a pount on its rim after it has tur ed 38.96 degree.

A 5ft diameter solid wheel initially rotating at 50.0rad/s comes to a uniform stop after 8.0 rotations in radians. What is the tangential acceleration at the rim of the wheel?

If the moment of inertia of a tire is 0. 63 kg.m² and its weight is 24.5 N, what is the diameter of the tire? If the weight is doubled, what will be the moment of inertia?

What is the tangential acceleration of a bug on the rim of a 9.0 inch diameter disk if the disk moves from rest to an angular speed of 90 revolutions per minute in 4.0 seconds?

A simple pendulum of length 30cm us suspended vertically. What is the period of the pendulum? What is the angular frequency of motion

A pendulum on planet X, where the value of g is unknown, oscillates with a period of 2 seconds. What is the period of this pendulum on earth where g= 9.8meter per second square?