Question

A blue ball is thrown upward with an initial speed of 21.2 m/s,
from a height of 0.5 meters above the ground. 2.6 seconds after the
blue ball is thrown, a red ball is thrown down with an initial
speed of 11.7 m/s from a height of 25.7 meters above the ground.
The force of gravity due to the earth results in the balls each
having a constant downward acceleration of 9.81
m/s^{2}.

A) What is the speed of the blue ball when it reaches its maximum height?

B) What is the height of the red ball 3.38 seconds after the blue ball is thrown?

C) How long after the blue ball is thrown are the two balls in the air at the same height?

Answer #1

A blue ball is thrown upward with an initial speed of 21.4 m/s,
from a height of 0.9 meters above the ground. 2.6 seconds after the
blue ball is thrown, a red ball is thrown down with an initial
speed of 9.2 m/s from a height of 25.3 meters above the ground. The
force of gravity due to the earth results in the balls each having
a constant downward acceleration of 9.81 m/s2.
1) How long after the blue ball...

A
ball is thrown upward from a height of 3m at an initial speed of 45
m / sec. Acceleration resulting from gravity is -9.8 m/sec^2.
Neglecting air resistance, solve for the velocity, v(t), and the
height, h(t), of the ball t seconds after it is thrown and before
it hits the ground.

a steel ball is thrown downward with an initial speed of 10.5
m/s from the height of 62.4 m above the ground. At the same
instant, a camera is propelled vertically upward from the ground
level with a speed of 34.3m/s. At what height above the ground will
the two objects pass each other.

A ball is thrown upward with speed of 38.0m/s from top of
building 240 m tall: a) How long will it take to reach ground?
b)how long will it take for this ball to reach the highest point.
c) How long after ball is thrown will it be found 265 m above
ground? d) What is velocity of ball as it reaches the ground ? e)
what will be the velocity of this ball at the highest point? f) how...

A ball is thrown directly downward with an initial speed of 7.75
m/s, from a height of 29.4 m. After what time interval does it
strike the ground?
______________ s

A ball is thrown directly downward with an initial speed of 8.25
m/s, from a height of 29.7 m. After what time interval does it
strike the ground?

A ball is thrown directly downward with an initial speed of 8.45
m/s, from a height of 29.9 m. After what time interval does it
strike the ground?

A ball with mass m kg is thrown upward with initial velocity 16
m/s from the roof of a building 28 m high. Neglect air resistance.
Use 9.8 m/s2. Round your answers to one decimal place. (a) Find the
maximum height above the ground that the ball reaches. meters (b)
Assuming that the ball misses the building on the way down, find
the time that it hits the ground.

A ball is thrown vertically upward from a window that is 3.6 m
above the ground. The ball's initial speed is 2.8 m/s and the
acceleration due to gravity is 9.8 m/s^2.
a) What is the ball's speed when it hits the ground?
b) How long after the first ball is thrown should a second ball
be simply dropped from the same window so that both balls hit the
ground at the same time?

rock thrown upward with an initial speed of 24.5 m/s
from the top of a 50m tower.
a. what's the rockets velocity the instant it hits the
ground?
b. how long is it in the air?
c. what's the max height above the building the ball
reaches?

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