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3 years ago

What is the speed of a bobsled whose distance-time graph indicates that it traveled 116m in 29s?

Physics

2 answers:

ryzh [129]3 years ago

5 0

Speed = Distance ÷ Time
Speed = 116 ÷ 29
Speed = 4

mars1129 [50]3 years ago

5 0

Speed = (distance covered) / (time to cover the distance)

= (116 meters) / (29 seconds)

= (116/29) (meters per second)

= 4 meters per second (4 m/s)

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Aleksandr-060686 [28]

Answer:

Explanation:

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3 years ago

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Answer:

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2 years ago

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zaharov [31]

3. The upward force is greater
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2 years ago

During light activity, a 70-kg person may generate 200 kcal

Lerok [7]

Answer:

$2.75387\ ^{\circ}$

Explanation:

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$Q=mc\Delta T\\\Rightarrow \Delta T=\dfrac{Q}{mc}\\\Rightarrow \Delta T=\dfrac{0.8\times 200\times 1}{70\times 0.83}\\\Rightarrow \Delta T=2.75387\ ^{\circ}C$

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3 years ago

What task requires the most work, lifting a 12-kg sack 2 meters or lifting a 25-kg sack 1 meter?

MrMuchimi

Multiply the masses by the respective distances:

(12 kg) (2 m) = 24 J

(25 kg) (1 m) = 25 J

so the heavier bag takes more work to lift, and (b) is the answer.

(d) is technically correct if the sacks are carrying different contents whose masses are not equal, but since we don't know what's inside each sack, assume 12 kg and 25 kg are the masses of each sack *and* their contents.

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2 years ago