What is the initial velocity in the y - direction for an object thrown horizontally from a cliff at 3m/s
What is ZERO!
If a tennis ball takes 4.5 sec to reach its highest point, how long does it take to reach the other player?
9 seconds!
velocity decrease, speed increase
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 Increasing a projectile's mass will decrease the distance that it travels.
FALSE
A baseball is dropped from the roof of a tall building. If it takes 7 seconds for the ball to reach the ground, what is the height of the building?
240 meters
How do we find the x-component of velocity
What is cos(theta)
What angle will produce the maximum range of a projectile?
45 degrees
What are the x and y components of a velocity of 25m/s 32 degrees above horizontal?
what is x = 21.2 and y = 13.2
What valuable information do you know about a projectile at the peak of its trajectory?
Vy=0
Peak occurs at half of total time
An bowling pin is thrown upward with a velocity of 2.5 m/s. What is the time to reach the maximum height AND the time to return to the ground.
t1/2 = .255
t = 0.51
This component is found using sin(theta)
What is the Y velocity
Which angle would you choose to produce the longest flight time?
close to 90
What happens to vertical and horizontal accelerations of a projectile as it approaches its maximum height?
Vertical doesnt change.
Horizontal is zero and doesnt change.