Circular motion (AKA the shortest section in Physics lesson)
Unified circular motion describes an object swinging in circles. This deals with a new concept of centripetal acceleration. Which also relateds to mass and velocity. Force Diagrams are also used in this section.
Units used:
R= radius
mass=kg
V= velocity
N=Newtons
I will be demonstrating
UCM 1 - I can draw a properly labeled force diagram showing all forces acting upon an object moving in a circular path
UCM 2 - I can determine whether the forces are balanced or unbalanced for an object in circular motion.
UCM 3 - I can calculate the centripetal acceleration of an object moving in a circular path
UCM 4 - I know the relationship between velocity and radius, mass, or force
UCM 5 - I can use centripetal acceleration to solve different problems
UCM 6 - I know the relationship between mass, distance and gravitational force
Units used:
R= radius
mass=kg
V= velocity
N=Newtons
I will be demonstrating
UCM 1 - I can draw a properly labeled force diagram showing all forces acting upon an object moving in a circular path
UCM 2 - I can determine whether the forces are balanced or unbalanced for an object in circular motion.
UCM 3 - I can calculate the centripetal acceleration of an object moving in a circular path
UCM 4 - I know the relationship between velocity and radius, mass, or force
UCM 5 - I can use centripetal acceleration to solve different problems
UCM 6 - I know the relationship between mass, distance and gravitational force
Question
A car moves over a hill. Assume that the car travels at a constant speed of 11.1 m/s. Draw a force diagram, centripetal acceleration, and then find the net force.
Givens:
radius = 25m
mass = 1200kg
velocity of the car = 11.1 m/s
ResponseUse the equation for centripetal acceleration. Plug in the given velocity and radius. Then you get the centripetal acceleration. The relationship described here is that velocity is composed of the mass and the force. The radius gives on the acceleration you have in the car.
multiply in centripetal acceleration with the mass of the car and you get 5414.08 Newtons for the net force in the system. Since the car is moving over a hill the gravity exceeds the Normal force exceeds the normal force because it is moving over it. The weight force is the opposite of the normal force. Forces are unbalanced because weight is with gravity pulls the car down when it is on a hill. |