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riadik2000 [5.3K]
3 years ago
15

A ball rolls down a hill and hits a box. The momentum of the ball decreases. Which happens to the momentum?

Physics
1 answer:
Nezavi [6.7K]3 years ago
8 0
First let us examine our options. For B, the law of inertia state that an object will keep on moving unless acted upon an external force. And I am thinking this is not the appropriate answer here. Also for C momentum and mass are not the same. Momentum is energy. Momentum cannot be converted to mass. A is the answer since momentum. When the ball hits the box, the box will move and decreases the velocity of the rock. Here momentum is transferred. <span />
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An ice boat is coasting along a frozen lake. Friction between the ice and the boat is negligible, and so is air resistance. Noth
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Answer:

(A) No

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Explanation:

(A) since there is nothing propelling the boat and the friction between the ice and the boat and also air resistance is negligible the net force of the system in the horizontal direction is zero and hence there is no change in the horizontal momentum of the boat.

(B) Since the person had not velocity in the horizontal direction before landing on the boat but now has one after landing on the boat, the speed of the boat will decrease because the momentum has to be conserved (remember there is no change in it).

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3 years ago
At the accounting break-even point, Swiss Mountain Gear sells 22,940 ski masks at a price of $19 each. At this level of producti
gogolik [260]

Answer:

fixed cost $231220

Explanation:

given data:

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variable cost = $6 per unit

therefore

Contribution/unit of ski mask  = 19 - 6 = $13

for 22940 ski masks, total cost =  (22940*13) =  298220

Depreciation cost  $67000

fixed cost is = 298220 - 67000 = $231220

8 0
2 years ago
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Answer:

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Explanation:

I hope this helped...

7 0
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What does g mean in physics
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Answer:

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3 0
3 years ago
Read 2 more answers
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