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### how does rotation differ from revolution

rotation is the turning on an internal axis while revolution is turning on an external axis.

###
how would relative simulated gravity of a rotating space station change if

a)it had twice the radius

b)it had twice the angular velocity

C)it had twice the radius and twice the angular velocity

a)2xa

b)4xa

c)8xa

### compare and contrast centripetal force and centrifugal effect and supply examples of each

centrifugal effect is a center fleeing tendency of an object to fly away from center, centripetal is the opposite. It is a center seeking force. example of centrifugal effect is in a car when tangential inertia and a centripetal force are acting upon an object it creates the centrifugal effect in which if you turn left the passenger will scoot towards the door. An example of centripetal force is when you spin a can on a string that enforces it to stay in circular motion.

### why are radians used in circular motion calculations

because 6.28 radians = 360 degrees = number of degrees in a circle.

### which has the greater linear velocity, a horse near the outside of a carousel or one near the inside

the outside horse

### which has a great angular velocity, a horse near the outside of a carousel or the one near the inside

the have the same

###
which of the following is a unit of angular velocity

a) degrees/second

b) rad/second

c) rpm

d) all of these

e) none of these

all of these

### what type(s) of circular motion does a carousel horse 2m from the axis experience

rotation and revolution

### how are the wheels of a railroad car designed in order for them to turn at different speeds

> diameter in

###
what is true about our Moon's circular motion

a) rotation>revolution

b) rotation<revolution

c) rotation=revolution

rotation=revolution

### earth rotates and revolves through space. earth rotates about the ______, which is an _______ axis. Earth revolves about the ______, which is an ________ axis.

north/south pole, internal, Sun, external

###
which of these statements is true

a) 360degrees=6.28radians

b) 1rpm=.105rad/s

c) 1radian=57.3degrees

d) all of these

d)all of these

###
which carousel horse has greater centripetal force

a) outside

b) inside

c) outside=inside

a) outside

### what techniques for measuring r and theta would you recommend for best results

I used the tangent equation and derived for theta. I used the theta that I found and plugged it into the sin equation to find the opposite side, then I used the theory of similar triangles and lasers to find the radius.

### what do you conclude about the direction of the net force that keeps the flying pig in uniform circular motion

The direction of the net force is in a radial direction towards the center/centripetal

### for uniform circular motion the centripetal force will always be _______ the tension in the string

less than

### how did the pig overcome air friction

the pig overcomes air friction by flapping its wings. this creates a centripetal force on the pig which in turn counters friction

### list sources of error for pig lab

-timing not precise

-didn't find the exact point at which the hypotenuse reaches the other leg of the triangle with the laser