# IDK what to call this so im just saying blah blahhh

Essay by balalala October 2013

Test Review - 1D Motion and Right Triangle Math - Physics I / PreAP Physics

What happens when a heavy object and a lighter object are dropped from a large height? (Does it matter if there is air resistance?)

Air resistance DOES matter. If we remove air resistance (remember the dropping objects on the moon video?) then the heavy object and the light object will accelerate downward at the same rate. Both will hit the ground at the same time.

Describe the motion of an object that is thrown upward under the influence of gravity.

As the object rises, it slows down until it stops for just a moment at the top of its trajectory. Then, it begins to fall downward, speeding up as it falls down.

The vertical velocity at the top of the trajectory equals 0 m/s. The initial velocity as it heads upward equals the velocity as it falls downward when the object is at the same height relative to the ground.

The acceleration of the object is constant. The acceleration at ALL POINTS equals 9.8 m/s/s downward.

3) Vocabulary words: Vector, scalar, magnitude, direction, component, resultant

Check you notes or look up via dictionary.com

4) A duck waddles 10 meters North and 15 meters South. Draw a diagram to illustrate the problem. What is his distance traveled? What is his displacement?

Distance traveled = 10 m + 15 m = 25 m

Displacement - + 10 m - 15 m = -5 m (or 5 meters south of the starting point)

5) A goat skips 10 meters North and 15 meters East. What is his distance traveled?

What is his displacement?

Distance traveled = 10 m + 15 m = 25 m

Displacement: you need to use the Pythagorean theorem, with the 10 meters and the...