m above theA sandbag is dropped from a hot ai balloon at a height of 12ground. Find its velocity as it hits the ground. Disregard air resistance.An ironworker drops a hammer 5.25 m to the ground. What is its speed as it hitsthe ground?A box is dropped 3.60 m to the ground. What is its speed as it hits the ground?A piece of broken glass with mass 15.0 kg falls from the side of a building 8.00 mabove the street. (a) What is the kinetic energy of the glass as it hits the street?(b) What is the speed of the glass as it hits the street?11. A ball is thrown downward from the top of a building at a speed of 75 ft/s. Findits velocity as it hits the ground 475 ft below. Disregard air resistance.12. Find the maximum height reached by a ball thrown upward at a velocity of95 ft/s13. A 4.000-kg mass is dropped from a hot air balloon 300.0 m above the ground.Find its kinetic energy, its potential energy, and the sum of the kinetic energyand the potential energy in 1-s intervals until the mass hits the ground. (Assumeno air resistance.)8.9.10.77

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Asked Nov 15, 2019
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#11

m above the
A sandbag is dropped fro
m a hot ai balloon at a height of 12
ground. Find its velocity as it hits the ground. Disregard air resistance.
An ironworker drops a hammer 5.25 m to the ground. What is its speed as it hits
the ground?
A box is dropped 3.60 m to the ground. What is its speed as it hits the ground?
A piece of broken glass with mass 15.0 kg falls from the side of a building 8.00 m
above the street. (a) What is the kinetic energy of the glass as it hits the street?
(b) What is the speed of the glass as it hits the street?
11. A ball is thrown downward from the top of a building at a speed of 75 ft/s. Find
its velocity as it hits the ground 475 ft below. Disregard air resistance.
12. Find the maximum height reached by a ball thrown upward at a velocity of
95 ft/s
13. A 4.000-kg mass is dropped from a hot air balloon 300.0 m above the ground.
Find its kinetic energy, its potential energy, and the sum of the kinetic energy
and the potential energy in 1-s intervals until the mass hits the ground. (Assume
no air resistance.)
8.
9.
10.
77
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m above the A sandbag is dropped fro m a hot ai balloon at a height of 12 ground. Find its velocity as it hits the ground. Disregard air resistance. An ironworker drops a hammer 5.25 m to the ground. What is its speed as it hits the ground? A box is dropped 3.60 m to the ground. What is its speed as it hits the ground? A piece of broken glass with mass 15.0 kg falls from the side of a building 8.00 m above the street. (a) What is the kinetic energy of the glass as it hits the street? (b) What is the speed of the glass as it hits the street? 11. A ball is thrown downward from the top of a building at a speed of 75 ft/s. Find its velocity as it hits the ground 475 ft below. Disregard air resistance. 12. Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s 13. A 4.000-kg mass is dropped from a hot air balloon 300.0 m above the ground. Find its kinetic energy, its potential energy, and the sum of the kinetic energy and the potential energy in 1-s intervals until the mass hits the ground. (Assume no air resistance.) 8. 9. 10. 77

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Expert Answer

Step 1

Given:

Initial velocity of the ball, u =75 ft/s

Height of the building = 475 ft

Gravitational acceleration = 9.8 m/s2

                                               = 32.15 ft/s2

 

Step 2

Final velocity of the ball can be calculated b...

v2 u2gh
plug in the values
(75)2x 32.15x 475
v = 5625 30542.5
v = /36167.5
v =190.18 ft/s
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v2 u2gh plug in the values (75)2x 32.15x 475 v = 5625 30542.5 v = /36167.5 v =190.18 ft/s

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