What is the vertical velocity at the peak of a projectile's trajectory, explain why?
Zero
If the vcos(angle) = 10 m/s, what is the range after 10 seconds, explain your answer?
100 meters
The main factor affecting vertical velocity is ___________.
GRAVITY
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!
What is the total time, if the peak time is 10 seconds, explain why?
20 seconds
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
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
TRUE/FALSE: The more mass an object has, the faster it will fall., explain?
False
How does a significant amount of air resistance affect a projectile's motion?
It affects the vertical and horizontal range.
AN object at rest accelerates at 20 m/s^2 for 3 seconds, what was the object initial velocity, include units?
0 m/s
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.
When changing the initial velocity of an object and measuring the range, which one is the dependent variable?
What is the initial velocity?
What is the equation used to calculate the vertical range?
dy=vsin(0)t + 1/2gt^2
What is the trajectory of a projectile called (Hint: Graphing y= -x^2)?
What is a parabola!
If you throw a baseball straight up, what is its acceleration at the highest point?, explain?
9.81 m/s^2
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
What is the vertical acceleration of a projectile?
9.81 m/s^2
If a ball was tossed upward and it reached its highest point, describe its velocity as it falls back down, explain?
It INCREASES
Looking at a A-T graph, what does a ZERO slope line represents, explain why?
it represents constant acceleration.
For an upwardly launched projectile, _______ is the best angle to shoot a projectile the furthest distance vertically, explain?
90 degrees
Looking at a D-T graph, what does a ZERO slope line represents, explain why?
No movement
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?