Question and answer
An object with a mass of 78 kilograms is lifted through a height of 6 meters. How much work is done? A. 47.75 J B. 4,586.4 J C. 764.4 J D. 468 J
An object with a mass of 78 kilograms is lifted through a height of 6 meters. The work done is 4,586.4 J. Solution: Work done = mgh Work done = 78 * 9.8 * 6 Work done = 4,586.4 J. (answer)
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Asked 4/8/2019 8:02:56 AM
Updated 186 days ago|7/22/2020 10:33:28 PM
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An object with a mass of 78 kilograms is lifted through a height of 6 meters. The work done is 4,586.4 J.
Solution:
Work done = mgh
Work done = 78 * 9.8 * 6
Work done = 4,586.4 J. (answer)
Added 186 days ago|7/22/2020 10:33:28 PM
This answer has been confirmed as correct and helpful.
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Why did the India Act in 1937 fail? A. The common people didn't support it. B. Hindus feared the Muslim majority. C. Muslims feared that Hindus would dominate the legislature. D. Gandhi opposed the Act.
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. A body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. How far does the body move in 5 seconds? A. 260 m B. 196 m C. 162.5 m D. 137.5 m
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Updated 239 days ago|5/31/2020 11:50:33 AM
1 Answer/Comment
A body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. the body moves 137.5 meters in 5 seconds.
Solution:
s = ut + 1/2 at^2; s = 20 m/s (5 sec) + (1/2) (3 m/s^2) (5 sec)^2
s =100 m + (1.5 m/s^2) (25 s^2)
s = 100 m + 37.5 m
s = 137.5 meters. (answer)
Added 239 days ago|5/31/2020 11:50:33 AM
This answer has been confirmed as correct and helpful.
Imagine that a tank is filled with water. The height of the liquid column is 7 meters and the area is 1.5 square meters (m2). What's the force of gravity acting on the column of water? A. 73,500 N B. 102,900 N C. 110,700 N D. 68,600 N
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Updated 217 days ago|6/22/2020 4:48:10 PM
1 Answer/Comment
Imagine that a tank is filled with water. The height of the liquid column is 7 meters and the area is 1.5 square meters (m2). The force of gravity acting on the column of water is 102,900 N. Solution: The volume of water is (1.5 m² x 7 m) = 10.5 m³; 10.5 m³ = 10,500 liters; Weight of the water = (10,500 kg) x (9.8 m/s²) = 102,900 newtons.
Added 217 days ago|6/22/2020 4:48:10 PM
This answer has been confirmed as correct and helpful.
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Updated 49 days ago|12/6/2020 11:02:22 PM
1 Answer/Comment
If a car travels from Town A to Town B on one road at different speeds and stops at red lights, knowing the distance between the towns and the total time of the trip can allow you to calculate average velocity.
Added 49 days ago|12/6/2020 11:02:22 PM
This answer has been confirmed as correct and helpful.
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