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marusya05 [52]
3 years ago
12

You throw a ball horizontally from the top of a building, with a speed of 3 m/s. In this problem, you can neglect the force of a

ir resistance.After 2 Seconds, what is the balls horizontal velocity?A. Impossible to tellB.Less than 3 m/sC. 3 m/sD. 0E.More than 3 m/s
Physics
1 answer:
Neporo4naja [7]3 years ago
8 0

Answer:

C. 3m/s

Explanation:

Since we ignore air resistant, horizontally speaking, theres no force acting on the ball. According to Newton's 1st law of motion, when there's no force, the object will stays in the same velocity.

In this case after, the ball velocity would still be 3m/s

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Answer:

Explanation:

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7 0
3 years ago
A car weighing 14,700 N is speeding down a highway with a velocity of 99 km/h. What is the
tankabanditka [31]

Answer: 148348.6239 kg•m/s

Explanation: Firstly, we need to convert the 14700 N into kilograms, and to do so, use the formula net force is equal to mass times acceleration and rearrange the formula to find mass like shown below...

F = ma

F/a = m

14700/9.81 = 1498.470948 kg, this is your mass

Now that we convert it into kilograms, plug all the numbers into the variable of the momentum formula.

Momentum formula is P = mass x velocity

Like this:

P = 1498.470948 x 99

p = 148348.6239 kg•m/s.

I believe that is your answer, hope that helps you even a bit out.

Thanks.  

7 0
2 years ago
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ladessa [460]

Answer:

option C

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The correct answer is option C

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Fire cut allows joist to leave if it fails without affecting the masonry wall standing.

Without fire cut, the burnt beam will rotate downward affecting the connection of beam and wall and leading to damage it.

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