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erica [24]
3 years ago
13

What is the mechanical advantage of a lever that is 20 meters

Physics
2 answers:
pav-90 [236]3 years ago
4 0

Answer:

5.765

Explanation:

ipn [44]3 years ago
3 0

Answer:

5.765

Explanation:

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Millions of children are treated each year for sports-related injuries.
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Answer:

True

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As per a survey conducted in the United States, it has been highlighted that among 30 million children participating in any sports, there are 3.5 million children who face injuries. It is because of these injuries that the children have to take some leave or absence from the sports. Also, the statistics discloses the fact that among all the injuries faced by the humans, one third of them are related to the childhood sports activities. Sprains and strains are among the most common of the injuries.

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A one-kilogram plate on a shelf has 19.6 J of potential energy. If the plate falls from the shelf, what will its maximum velocit
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3 years ago
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If a rock is dropped with a weight of 50kg and friction due to air resistance produces a force of 98N, what is the net force in
bearhunter [10]

Answer:

The net force is 392N, pointing down.

Explanation:

The net force is the sum of all forces acting on the rock, namely the gravity ("+" acting downward) and the friction force due to air resistance ("-" acting upward):

F_{net} = F_g - F_{air}\\F_{net} = m\cdot g - F_{air} = 50kg\cdot 9.8\frac{m}{s^2}-98N= (490-98)N=392N

The net force is 392N and pointing down (positive)/

8 0
4 years ago
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