Question

A ball is thrown toward a cliff of height h with a speed of 30m/s and an angle of 60 degrees above horizontal. it lands on the edge of the cliff 4 seconds later.

A) How high is the cliff?

B)What is the maximum height of the ball?

C)What is the ball's impact speed?

Answer #1

At first we have to find the horizotal and vertical components of the velocity

Velocity in x direction:

v = 30 * cos 60 = 15 m/s

Distance traveled (x )= 30 * t * cos 60 = 30 * 4 * cos 60 = 60
meters

Velocity along y direction:

a = -g

v = -g * t + 30 * sin 60

= -9.8 * 4 + 30 * sin 60

= -13.219 m/s

Now,

a) height of cliff =

Finding distance traveled along y axis

y = -(1/2) * g * t^2 + 30 * t * sin 60

= -(1/2) * 9.8 * 4^2 + 30 * 4 * sin 60

= -78.4 + 103.923

= 25.523 m

The cliff is 25.5 meters
high.

b) maximum height reached by ball = v^2sin^2(60)/2*g

= 30^2*sin^2(60)/2*9.8

= 34 .43 m

C) using the formula

vf^2 = vx^2 + vy^2

= (15)^2 + (-13.219)^2

= 399.748

vf = 19.994 m

Therefore ball impact velocity = 20m/s

A ball is thrown toward a cliff of height h with a speed of 33
m/s and an angle of 60 ? above horizontal. It lands on the edge of
the cliff 3.7 s later.
How high is the cliff?
What was the maximum height of the ball?
What is the ball's impact speed?

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 ball is thrown toward a cliff of height h with a
speed of 25m/s and an angle of 60? above horizontal. It lands on
the edge of the cliff 4.0s later.
A.
How high is the cliff?
Express your answer to two significant figures and include the
appropriate units.
B.
What was the maximum height of the ball?
Express your answer to two significant figures and include the
appropriate units.
C.
What is the ball's impact speed?
Express your...

A ball is thrown with an initial speed of 30m/s at an angle of
45 degrees. Assume the ball is thrown from ground level and lands
on the ground.
a) find the time of flight in secs?
b) find the maxium height in meters?
c) find the distance from where the ball is thrown to where it
lands in meters?
d) find the speed at the impact in meters/sec?

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,
how far from the base of the cliff will the ball land in the water
below? Calculate the answer in meters (m) and rounded to three
significant figures. A=8 B= 68
2. A water balloon is launched at a speed of (15.0+A) m/s and an
angle of 36 degrees above the horizontal. The water...

A ball is thrown up onto a roof, landing 3.10 s later at height
h = 18.0 m above the release level. The ball's path just
before landing is angled at θ = 63.0˚ with the roof.
(a) Find the horizontal distance d it
travels. (Hint: One way is to reverse the motion, as if it
is on a video.) What are the (b) magnitude and
(c) angle (relative to the horizontal) of the
ball's initial velocity?

3) A ball is thrown leftward from the left edge
of a roof at height “h” above the ground. The ball hits the ground
1.5 sec later at a distance d = 25 m from the building and at an
angle θ = 60° with the horizontal.
a)
What is the value of “h”?
b)
What is the magnitude of the initial velocity?
c)
What is the angle of the initial velocity?

A
ball is thrown at an angle of 40 degrees above the horizontal at a
speed of 16.0 m/s from the top of a 12.4 m tall bldg. What is the
maximum height of the ball above the ground?

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/s2.
A) What is the speed of the...

A
person is standing on top of a 57-m cliff. He throws a ball
straight up right at the very edge of the cliff so that when it
falls it lands at the base of the cliff. The speed of the ball as
it leaves his hand is 22.5 m/s.
A. What is the ball's maximum height?
B. How long is the ball in the air?
C. At what heights (there are two) is the speed of the ball
10.0...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 32 minutes ago

asked 38 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago