Work Problems
The total horizontal distance a ball travels when the horizontal velocity is 22 m/s and the time to the maximum height is 1 second.
44 meters
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
A ball rolls off a cliff that is 15 meters high and falls 30 meters from the side of the cliff. What is the initial horizontal velocity of the ball?
17.1 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
A ball is launched at a 40 degree angle at 32 m/s. Calculate the total time the ball was in the air.
5.5 seconds
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 math function does the trajectory of a projectile called? (not going to be on the test).
a parabola!
A ball was in the air for 4 seconds and travelled 32 meters. What is the initial velocity of the ball?
21.17 m/s
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
A football is thrown 30 m/s at 20 degrees above the horizontal. Find the distance the ball is thrown.
56.4 meters horizontally
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
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.