Motion and Forces 1 Flashcards Preview

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Flashcards in Motion and Forces 1 Deck (13):

How to solve an equilibrium question

Make a triangle and use trigonometry


Is Centripetal force a force?

No, centripetal force is a net force


What conditions are you able to use the motion formulas?

When acceleration is constant


What happens when a car goes over a speed bump

when a car goes over a speed bump, the normal reaction becomes less than the weight of the car


Define conical pendulum

A ball ganging on a string and going round in a horizontal circle


Geosynchronous satellite

Satellites that travel above any great circle


Define Lever

A lever is a device for amplifying forces. Longer lever=more amplification


Kepler's first law

The law of orbits: All planets move in elliptical orbits with the sun at one focus


Kepler's third law

The law of periods: The square of the period of a planet's orbit is proportional to the cube of the mean radius of its orbit


C.Force of a string attached to an object spun vertically

At highest point: F(c)=T+F(w)
At lowest point: F(c)=T-F(w)
If F(c)=F(w), then tension is zero and the string can go slack


Equilibrium of an object

An object at equilibrium has constant velocity, thus there's not net force or torque


Geostationary satellite

A satellite that's directly above a single point in the equator that has an orbit period of 24 hours


Kepler's second law

The law of areas: A line that connects a planet to the Sun sweeps out equal areas in equal times