Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Roche limit wikipedia , lookup
Mechanics of planar particle motion wikipedia , lookup
Artificial gravity wikipedia , lookup
Lorentz force wikipedia , lookup
Coriolis force wikipedia , lookup
Fictitious force wikipedia , lookup
Weightlessness wikipedia , lookup
Velocity-addition formula wikipedia , lookup
Uniform Circular Motion Uniform Circular Motion • Answer the following questions in your lab group: – What makes the motion “uniform?” – What are the measurable variables involved in the motion? – How do you measure the speed of the object? – Is the velocity constant? – Is there acceleration? ( what are the ways an object can accelerate? Tricky tricky!) – What direction is the net force acting on the object? • Uniform circular motion is the motion of an object that is traveling at a constant speed on a circular path. • This means: – Constant radius – Constant speed Speed in circular motion • The formula for speed: d s t • How do you find the distance around a circle? – Circumference: 2πr • What is the time it takes to complete a cycle called? – Period: T • The formula for the speed an object revolves or rotates around a circular path is: 2r s T • Ex: A horse on a merry-go-round takes 14.5 seconds to revolve around a ride with a radius of 3.50 m. How fast is the horse going? Speed is constant, what about velocity? • Velocity is not constant – Due to a change in the direction that it is pointing – Velocity is always tangent to the circular path • The change in the velocity is the acceleration • The change in the direction is the acceleration v1 v1 v2 v2 ∆v/t = a • Acceleration points towards the center • This is called Centripetal Acceleration – Centripetal means “center seeking” • What direction is the force pointing then? Centripetal Force • A center seeking force that causes objects to move in a circular motion. • Points along the radius towards the center of the circular path. • What factors could effect the amount of net force necessary to keep that UCM? UCM lab • Determine the mathematical relationship between _______________________ and the ________________________. • Determine the mathematical relationship between the net force required to keep the object in motion and the speed at which it travels around the circular path. Results? • How is the net force related to the speed for objects in UCM? • What would happen to the net force of we kept the speed constant but doubled the radius? • What would happen to the net force if we kept the speed and radius the same but doubled the mass?