Question

At t0 = 0 s a ball is thrown horizontally from the roof of a building 9.0 m tall. It lands 9.5 m from the base of the building.

a. What was the initial speed of the ball? v0 =

b. What was the impact speed of the ball? v1 =

c. At what time did the ball strike the ground? t1 =

Answer #1

Here the ball is thrown horizontally. So we have only horizontal component of initial velocity and vertical component of initial velocity is zero.

Finding the time from vertical motion we can find the initial velocity by the relation , v = d/t.

A
ball thrown horizontally from the roof of a building 7.50m tall.
the ball lands at 9.75 m away from the base. 1) how much time does
it take for the ball to land? 2) how much is the initial velocity
of the ball?

A ball is thrown straight up from the edge of the roof of a
building. A second ball is dropped from the roof a time of 1.17 s
later. You may ignore air resistance
A.
If the height of the building is 20.3 m, what must the initial
speed be of the first ball if both are to hit the ground at the
same time?
Express your answer in meters per second.
B.
Consider the same situation, but now let...

A ball is thrown horizontally with an initial speed of 50m/s
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a) How far away from the building will the ball hit the
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b) What is the horizontal component of its velocity when it hits
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c) Find the magnitude and direction of the velocity when it hits
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A ball is thrown horizontally from the top of a 68 m building
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resistance.
a. What is the vertical component of the velocity just before
the ball hits the ground?
c. What is the angle of the ball just before it hits the ground
( in degrees below x-axsis)?

A ball is thrown horizontally from the top of a 57.5-m building
and lands 122.3 m from the base of the building. Ignore air
resistance. (Assume the ball is thrown in the +x direction
and upward to be in the +y direction.)
(a)
How long (in s) is the ball in the air?
(b)
What must have been the initial horizontal component of the
velocity (in m/s)? (Indicate the direction with the sign of your
answer.)
(c)
What is the...

A ball is thrown horizontally from the top of a 70.0-m building
and lands 90.0 m from the base of the building. Ignore air
resistance. What is the velocity just before it hits the ground? In
meters per second

A ball is thrown horizontally from the top of a 70.0-m building
and lands 90.0 m from the base of the building. Ignore air
resistance. What is the velocity just before it hits the
ground?
Just give the magnitude in meters/second here.

A
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unit vectors i and j. The ball strikes the ground at a horizontal
distance from the building of 33.1 meters.
a.) What is the vertical velocity (vector) at t=1.04
seconds?
b.) What is the initial vertical velocity (vector)?
c) What is the inital...

A ball is thrown horizontally from the top of a 35 m high cliff.
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Find the time at which the ball strikes the ground.
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1. A ball is thrown horizontally of a cliff. If the initial
speed of the ball is (15.0+A) m/s and the cliff is (25.0+B) m high,
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significant figures. A=8 B= 68
2. A water balloon is launched at a speed of (15.0+A) m/s and an
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