Question

Q3: A cannonball with an initial height of 1.5 meter above the ground is fired from a cannon at an angle of θ above the horizontal and with initial velocity of 40 m/s. The cannonball travels a horizontal distance of 30 meters and passes over a 14 meter high castle wall. Find the initial firing angle θ How much time it takes for the ball to pass over the castle wall ?. Find the velocity (magnitude and direction ) if the cannonball as it over the castle wall

Answer #1

Q1:
A train accelerate from 0 m/s to 36 m/s in 12 seconds and
continues for 50 seconds at 36 m/s . The driver then brakes
strongly to stop in 26 m.
Find the constant acceleration of the train for the first 12
s
Find the total displacement traveled by train.
Find the acceleration for the braking phase.
How long does it take the train to stop from when the brakes
are first applied.
Q2:
A rocket is fired vertically...

A cannon, elevated 40o above the horizontal, is fired at a
castle wall 720m away on level ground. The initial speed of the
cannonball is 100m/s.
a. What are the initial horizontal (x-direction) and vertical
(y-direction) components of the velocity?
b. How long will it take for the cannon ball to hit the
wall?
c. How high on the wall does the cannon ball hit?

(Figure
1) A cannonball is fired
horizontally from the top of a cliff. The cannon is at
height H = 80.0m
above ground level, and the ball is fired with
initial horizontal speed v0.
Assume acceleration due to gravity to be g = 9.80m/s2
.
Part
A
Assume that the cannon is fired at
time
t=0 and that the
cannonball hits the ground at time tg. What is the
y position of the cannonball at the time
tg/2?
Answer numerically...

A cannonball, weighing 19.1 kg, is shot from a cannon sitting on
a ledge a height of 2.50 m above sea-level toward
a castle. It is shot with a velocity of 42.0 m/s at an angle of
55.0° above the horizontal. The cannonball impacts on the
castle wall 5.70 s later.
(a) At what height, in feet, does the cannonball hit the castle
wall?
(b) What is the cannonball’s impact velocity (magnitude and
direction) just before hitting the cliff?
(c)...

King Arthur's knights fire a cannon from the top of the castle
wall. The cannonball is fired at a speed of 58 m/s and an angle of
45°. A cannonball that was accidentally dropped hits the
moat below in 1.97 s.
How far from the castle wall does the cannonball hit the
ground?
What is the ball's maximum height above the ground?

King Arthur's knights fire a cannon from the top of the castle
wall. The cannonball is fired at a speed of 40 m/s and at an angle
of 35°. A cannonball that was accidentally dropped hits the moat
below in 1.2 s.
(a) How far from the castle wall does the cannonball hit the
ground?
(b) What is the ball's maximum height above the ground?

A cannonball is shot (from ground level) with an initial
horizontal velocity of 33 m/s and an initial vertical velocity of
25 m/s.
What is the initial speed of the cannonball?
What is the initial angle θ of the cannonball with respect to
the ground?
What is the maximum height the cannonball goes above the
ground?
How far from where it was shot will the cannonball land?
What is the speed of the cannonball 3.6 seconds after it was
shot?...

King Arthur's knights fire a cannon from the top of the castle
wall. The cannonball is fired at a speed of 60 m/s and at an angle
of 27°. A cannonball that was accidentally dropped hits the moat
below in 1.0 s. (a) How far from the castle wall does the
cannonball hit the ground? Incorrect: Your answer is incorrect. m
(b) What is the ball's maximum height above the ground? m

A ball is thrown from a height of 12.8m above the ground. The
initial velocity of the ball is 21.3m/s at an angle of 25o below
the horizontal. What is the magnitude of the velocity (in m/sec)
just before the ball hits the ground?

a cannon fires a 10.0kg cannon ball, 1.0m above the ground, and
20 degress to the horizontal, with an initial speed of 100m/s. A
castle 500m away has a wall that is 24.3m high.
a) at what distance above the castle wall does the cannon ball
pass?
b)calculate the average force that the cannon applied to the
cannon ball. The cannon ball was in the cannon for 0.02seconds
c) what is the vertical acceleration of the cannon ball at the...

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