The Principle of Conservation of Linear Momentum

Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they are holding each other. When they release their arms, Al moves off in one direction at a ...continues

word problem

a. What is the frequency of this motion? b. When is the mass first at the position x= -7.8cm

Pressure

Suppose that when you ride on your 7.70-kg bike the weight of you and the bike is supported equally by the two tires. If the guage pressure in the tires is 70.5 lb/in^2 and the area of contact between each tire and the road is 7.13 cm^2, what is your weight? Show your work.

Archimedes principle and buoyancy

Archimedes principle and buoyancy

mathematical explanation

I need a mathematical explanation of part a in question 25 of the attached jpeg file. Find the height...

Power

A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.3s, What is the average power being expended?

Power

A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.3s, What is the average power being expended?

Rotational Motion and Angular Displacement, Angular Velocity and Angular Acceleration

A Ferris wheel rotates at an angular velocity of 0.24 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.030 rad/s^2. How long does it take the wheel to come up to operating speed?

Centripetal Acceleration and Tangential Acceleration

A centrifuge is used for training astronaunts to withstand large accelerations. It consists of a chamber (in which the astronaunt sits) that is fixed to the end of a long horizontal and rigid pole. The arrangement is rotated about an axis perpendicular to the pole's free end. Such a centrifuge starts from rest and has an angular ...continues

The Action of Forces and Torques on Rigid Objects

In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable, which can rotate about a vertical axis through its center. Then, two people push perpendicularly on the car, one at each end. The turn table is rotated one-half of a revolution to turn ...continues