Question

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?

Answer #1

A ball is thrown from a point 1.10 m above the ground. The
initial velocity is 19.7 m/s at an angleabove the horizontal. If
the maximum height of the ball aboveground is 7.29 m, what was the
angle atwhich the ball was thrown? Answer in degrees. [Hint:all
information necessary to solve this problemis providedl.]

A ball is shot from the ground into the air. At a height of 6.9
m, its velocity is V=7.5i+6.9j m/s, with i horizontal and j upward.
(a) To what maximum height does the ball rise? (b) What total
horizontal distance does the ball travel? What are the (c)
magnitude and (d) angle (below the horizontal; give as negative) of
the ball's velocity just before it hits the ground?

A
ball is thrown upward from a height of 3m at an initial speed of 45
m / sec. Acceleration resulting from gravity is -9.8 m/sec^2.
Neglecting air resistance, solve for the velocity, v(t), and the
height, h(t), of the ball t seconds after it is thrown and before
it hits the ground.

A ball is thrown vertically upwards with an initial velocity of
10 m/s, from a platform that is at a height of 75 m above the
ground. The ball reaches a maximum height and, on the way down,
misses the platform and falls all the way to the ground. Take the
magnitude of the acceleration due to gravity to be 10 m/s2.
(a) What is the velocity of the ball just before it reaches the
ground?
(b) How many seconds...

2. (15pts, 5pts
each) A ball is thrown from the top of a building that is
H = 40 m height. It has an initial velocity
v0 that is at angle
of = 53° below the horizontal direction, as shown in the
below Figure. The ball hits the ground t = 2.0 s after being
thrown. You may neglect air resistance.
a) Find the magnitude of the initial velocity
v0 of the ball.
b) Find the velocity of the ball just...

4. A ball is thrown at 20 m/s at an angle of 7 degrees above the
horizon.
a. How far does it reach if it is thrown from a height of 2
m?
b. What would the horizontal component of the velocity be as the
ball hits the ground?
c. What would the overall speed of the ball be as it hits the
ground?

A ball is fired from the ground into the air. When y= 13 m, its
velocity is v = (8 i +
15j) m/s. Determine: a) the maximum height reached
by the ball b) the horizontal distance that the ball travel c) the
magnitude and angle of the ball's velocity just before it hits the
ground.

A
ball is thrown from the roof of a building. The initial velocity
vector is at an angle of 53.0° above the horizontal. It is at
maximum height in 1.04 seconds. Express all vectors in terms of
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 upward with an initial velocity of 16.0 m/s at
an angle of 50.0 degrees above the horizontal. Use energy
conservation to find the ball's greatest height above the
ground.

A stone thrown from the top of the building is given an initial
velocity of 8 m/s at an angle of 20.0o below horizontal. It strikes
the ground 3.00 s later. (a) How far horizontally from the base of
the building does the stone strike the ground? (b) Find the height
from which the stone is thrown? (c) How long does it take the ball
to reach a point 10.0 m below the level of launching? (d) What are
the...

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