Question

A boy kicks a rock off a cliff with a speed of 18.2 m/s at an angle of 54.0° above the horizontal. The rock hits the ground 5.21 s after it was kicked.

How high is the cliff?

What is the speed of the rock right before it hits the ground?

What is the maximum height of the rock in the air, measured from the top of the cliff

Answer #1

Rock thrown off a cliff
You want to know the height of a cliff so you throw a rock off the
edge with an initial speed of 18.5 m/s inclined at an angle 30.3°
above the horizontal. You have a friend that records that it takes
3.4 s for the rock to hit the bottom of the canyon after it is
thrown. For the following questions, call up the positive
y direction and make the positive x direction
horizontal and...

a
ball is kicked off a cliff with a velocity if 13.99 m/s at an angle
of 35 deg above the horizontal. the height of the cliff is 15.0m.
ignoring air resistance.
a)whats the horizontal velocity of the ball?
b)how long is the ball in the air?
c)what speed does the ball hit the ground with

A rock is launched off a cliff at a speed of 12.1 m/s at an
angle of 35.0 degrees above the horizontal. The height of the cliff
is 16.1 m. How far horizontally from the edge of the cliff does the
rock land (to one decimal place)?
In your solution, also sketch the x-t, y-t, vx-t,
vy-t, ax-t, and ay-t diagrams.

A soccer player kicks a rock horizontally off a 37 m high cliff
into a pool of water. If the player hears the sound of the splash
2.92 s later, what was the initial speed given to the rock (in
m/s)? Assume the speed of sound in air is 343 m/s.
B
What If? If the temperature near the cliff
suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what
would the initial speed of the rock...

Jason kicks a ball off of a 15-m-high cliff. The kick is at an
angle of 30 degrees above the horizon with a speed of 20 m/s. In
this problem you will be ultimately solving for the distance from
the cliff that the ball lands. 1. Solve for the time it will take
the ball to hit the ground. 2. Solve for the horizontal distance
from the cliff that the ball will land. r = r0 + V0t + 1/2at^2

A worker kicks a flat rock lying on a roof. The rock slides up
the incline 10.0 m to the apex of the roof, and flies off the roof
as a projectile. What maximum height (in m) does the rock attain?
Assume air resistance is negligible, vi = 15.0 m/s, μk = 0.480, and
that the roof makes an angle of θ = 43.5° with the horizontal.
(Assume the worker is standing at y = 0 when the rock is...

A rock is thrown from the edge of a cliff 125m above the ground
with an initial speed of 65.0m/s and at an angle of 37.0 degree
with respect to the horizontal. A). What is the maximum height
above the ground that the rock will reach? B). How long does it
take for the rock to hit the ground? C). How far from the bottom of
the cliff will the rock hit the ground?

A ball is thrown toward a cliff of height h with a
speed of 30 m/s and an angle of 60∘ above horizontal. It lands on
the edge of the cliff 3.0 s later.
a) How high is the cliff?
b) What was the maximum height of the ball?
c) What is the ball's impact speed?

A rock is thrown from the top of a building 80 m high, with a
speed of 14 m/s at an angle 25 degrees above the horizontal. When
it hits the ground, what is the magnitude of its velocity (i.e. its
speed).

A person kicks a ball up into the air with a speed of 25 m/s, at
an angle of 75 degrees above the horizontal.
a) how long is the ball in the air?
b) what maximum height does the ball reach?
c) how far away does the ball land?

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