# Physics: Rotational, Projectile, Satellite Motion, Gravity

## 17 terms

200 m.

### A flywheel's diameter is twice that of another of the same shape & mass. The larger flywheel's rotational inertia is...

TWO times the other's.

### Since each rolling wheel of a railroad train is tapered, the narrow part of the wheel has a tangential speed that is...

SMALLER than that of the wide part.

INCREASE.

ZERO.

### The reason the moon does not crash into the Earth is that the...

moon has a sufficient TANGENTIAL SPEED.

### The concept of FORCE is not fundamental to...

Einstein's Theory of Gravitation

### Th force of gravity does work on a satellite when it is in...

ELLIPTICAL orbit.

CENTER OF MASS!

### A carnival has a Ferris wheel where the seats are located halfway between the center & the outside rim. Compared with a Ferris wheel with seats on are the outside rim, your ANGULAR speed while riding on this Ferris wheel would be...

the SAME and your TANGENTIAL SPEED less.

### A vertically-oriented rocket that is somehow able to maintain a continuous upward velocity of 8 km/s will...

ESCAPE from the Earth!

The FIRED one.

### Tangential Speed

~ The speed of something moving along a CIRCULAR path. (direction of motion is always TANGENT to the circle!)
~ DIRECTLY PROPORTIONAL to Rotational Speed (@ a fixed radial distance)

### Rotational Speed

~ aka: Angular Speed
~ Refers to the # of ROTATIONS/revolutions per min.

### Torque

~ the ROTATIONAL counterpart of Force
~ If you want to make a stationary object rotate, apply Torque!
~ Equals: Lever Arm x Force