What is the vertical velocity at the peak of a projectile's trajectory?
What is ZERO!
The horizontal component is independent from____________________.
What is the vertical component
The main factor affecting vertical velocity is ___________.
GRAVITY
If a tennis ball takes 4.5 sec to reach its peak, how long does it take to reach the other player?
9 seconds!
How much time would it take for a pencil to fall 0.98 meters?
0.45 sec
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
True/False. The horizontal velocity is affected by gravity.
FALSE
TRUE/FALSE. The vertical velocity is unaffected by the horizontal velocity.
TRUE
At what part of the projectile have minimum speed?
The top of the peak.
How does a significant amount of air resistance affect a projectile's motion?
it diminishes it
What is the scalar of velocity called?
What is SPEED
If Jane can jump her unicycle 0.34 meters off her driveway from rest, how would riding down the horizontal driveway(moving) and jumping affect her height?
Not at all, her vertical is independent of her horizontal.
The vertical component is independent the _______________________.
the horizontal component
In what direction is all of the velocity at the top of a projectile's peak?
HORIZONTAL
What is the trajectory of a projectile called?
a parabola!
What two factors does vertical velocity depend on?
Gravity and Distance(y)
How much will the horizontal velocity change in 19.6 seconds?
None at ALL
Vertical velocity can be determined by multiplying the acceleration due to gravity by ________________.
the time the projectile was in the air
At what other angle will a thrown ball go the same distance as one thrown 20 degrees?
70 degrees (You do not need to know this for the test.)
If a ball was tossed upward and it reached its highest point, describe its velocity as it falls back down.
It INCREASES
At the peak of a projectile's trajectory the velocity is both horizontal and vertical, vertical only or horizontal only?
Horizontal ONLY
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!
For an upwardly launched projectile, _______ is the best angle to shoot a projectile the furthest distance.
45 degrees (you do not need to know this for the test)
At what other angle will a thrown ball go the same distance as one thrown 44 degrees?
46 degrees! (You do not need to know this for the test, but they add up to 90 degrees, that's why)
EXPLAIN where AND how a package dropped from a plane lands with respect to the moving plane.
The package ends up UNDER the moving plane, since its horizontal velocity remains constant.