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Velocity
Horizontal component
Vertical component
Projectile motion
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100

What is the vertical velocity at the peak of a projectile's trajectory, explain why?

Zero

100

If the vcos(angle) = 10 m/s, what is the range after 10 seconds, explain your answer?

100 meters

100

The main factor affecting vertical velocity is ___________.

GRAVITY

100

If a tennis ball takes 10 sec to reach its peak, how much longer does it take to reach the other player?

10 more seconds!

100

What is the total time, if the peak time is 10 seconds, explain why?

20 seconds

200

If a ball is thrown straight up with a velocity of 5.8 m/s, what will its velocity be as it approaches the ground?

What is 5.8 m/s

200
True/False. The horizontal velocity is affected by gravity.
FALSE
200

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees.  Which one rises to a higher height? (assume no air resistance), explain?

65 degrees

200

TRUE/FALSE: The more mass an object has, the faster it will fall., explain?

False

200

How does a significant amount of air resistance affect a projectile's motion?

It affects the vertical and horizontal range.

300

AN object at rest accelerates at 20 m/s^2 for 3 seconds, what was the object initial velocity, include units?

0 m/s

300

If Jane can jump her unicycle 0.34 meters off her driveway from rest, how would riding down the driveway(moving) and jumping affect her height?

Not at all, her vertical is independent of her horizontal.

300

When changing the initial velocity of an object and measuring the range, which one is the dependent variable?

What is the initial velocity?

300

What is the equation used to calculate the vertical range?

dy=vsin(0)t + 1/2gt^2

300

What is the trajectory of a projectile called (Hint: Graphing y= -x^2)?

What is a parabola!

400

If you throw a baseball straight up, what is its acceleration at the highest point?, explain?

9.81 m/s^2

400

What is the fly time of a ball with an initial velocity of 30 m/s, launched at 45 degrees with the horizon?

What is 4.32 seconds

400

What is the vertical acceleration of a projectile?

9.81 m/s^2

400
At what other angle will a thrown ball go the same distance as one thrown 20 degrees?
70 degrees
400

If a ball was tossed upward and it reached its highest point, describe its velocity as it falls back down, explain?

It INCREASES

500

Looking at a A-T graph, what does a ZERO slope line represents, explain why?

it represents constant acceleration.

500
If you were to throw a rock 4.3 m/s, horizontally, and drop another from the same height, which would hit the ground first?
Neither, they would hit the ground at the same time!
500

For an upwardly launched projectile, _______ is the best angle to shoot a projectile the furthest distance vertically, explain?

90 degrees

500

Looking at a D-T graph, what does a ZERO slope line represents, explain why?

No movement

500

How much time would it take for a pencil to reach a maximum height of 10 meters, if launched with a Vy = 20 m/s (Hint: t=-Vy/g)?

What is 2.04 seconds?