Question

You throw a ball, m = 2kg, with an initial velocity of 20 m/s at an angle of 60 degrees from the top of a 30 m cliff?

a. using energy considerations, what is the magnitude of the velocity when it hits the ground?

b. what is the total mechanical energy in this system?

c. what if I change the angle to 50 degrees; does this change your answers?

Answer #1

1. You throw a ball from the top of a 50 m high building at 12
m/s straight upward. The ball misses the building on the way down.
The mass of the ball is 2 kg.
Using energy considerations, how high does the ball go?
Using energy considerations, what is the magnitude of the
velocity just as it strikes the ground?
What is the work done by the force of gravity on the ball while
the ball is traveling upward?...

3. You throw a ball, m= 2kg, with an initial velocity
of 25 m/s at an angle of 50 degrees from the top of a 30m
cliff.
a. Using energy considerations, what is the maximum height of the
ball?
b. What is the magnitude of the velocity when it hits the
ground?
c. Now, using KINEMATICS, what is the magnitude of the velocity
when it hits the ground?
4. You compress a spring with k = 3000 N/m a distance...

You throw a 2 kg ball from the top of a 30 m cliff with an
initial velocity of 25 m/s at an angle of 50 degrees.
a. using energy considerations, what is the maximum height of
the ball?
b. what is the magnitude of the velocity when it hits the
ground?
c. now, using kinematics, what is the magnitude of the velocity
when it hits the ground?

Suppose you throw a ball at 20 m/s at an angle of 60 degrees
from the horizontal from the top of a 40 m building.
a. what is the maximum height?
b. what is the velocity at the highest point?
c. what is the final velocity just as it hits the ground?
d. how far did it travel in the x direction when it hit the
ground?

A ball, mass is 8 kg, is thrown from the top of a 30 m cliff
with a velocity of 20 m/s straight up. The ball misses the cliff on
the way down. Ignore air resistance. Use work and conservation of
energy to find the following values.
a. what is the work done by gravity while the ball is in the
air?
b. what is the maximum height of the ball?
c. what is the magnitude of the velocity just...

a ball of mass 2kg is kicked from the edge of the flat
roof of a small building. the initial velocity of the ball makes an
angle of 30° with the horizontal, and the magnitude of the initial
velocity is 1 m/s. If the ball is moving at a speed of 9 m/s and it
hits the ground, how tall is the building?

A golfer prints an initial velocity of 30 m / s on a ball when hitting it with his club.
If the launch angle was 30 degrees. Determine the speed with which the ball hits the ground.
A.30 m/s
B.25 m/s
C.24 m/s
D.20 m/s

1. You throw a ball from the top of a 50 m high building at 12
m/s straight upward. The ball misses the building on the way down.
The mass of the ball is 2 kg.
a. Using energy considerations, how high does the ball go?
b. Using energy considerations, what is the magnitude of the
velocity just as it strikes the ground?
c. What is the work done by the force of gravity on the ball
while the ball...

A ball with an initial velocity of 5.55 m/s is shot at an angle
of 30 degree above the horizontal using a launcher. The launcher is
1.11m high.
i. How long is the ball in the air, before it hits the
ground?
ii. How far from the launcher does the ball land on the
ground?

You throw a ball for your dog to fetch. The ball leaves your
hand with a speed of 2 m/s, at an angle of 30◦ to the horizontal,
and from a height of 1.5 m above the ground. The mass of the ball
is 0.5 kg. Neglect air resistance in what follows.
(a) What is the acceleration of the ball while it is in flight?
Report it as a vector, that is, specify magnitude and direction (or
vertical and horizontal...

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