4 years ago

Which of the following is not an example of Newton’s third law?

Physics

1 answer:

Mrrafil [7]4 years ago

3 0

C) All of these are examples of Newton’s third law.

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In a physics lab, a 60-kg student runs up a 2.0-meter tall flight of stairs in 1.5 seconds. The work done to get to the top is 1

tester [92]

<span>The student's power rating is approximately 800W.
</span>
Power is the rate of doing work. Its SI unit is Watt. 1 W = 1J/sec

Given: <span>The work done to get to the top is 1200 Joules
</span>
Time = 1.5 seconds.

Power = $\frac{work done}{time} 
= \frac{1200J}{1.5 sec} 
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4 years ago

A cylinder that is 15 cm tall is filled with water. If a hole is made in the side of the cylinder, 4.0 cm below the top level. A

olga55 [171]

Answer:

About 13 cm

Explanation:

We are given that

Length of cylinder,l=15 cm= $15\times 10^{-2} m$

1 m=100 cm

h=4 cm= $\frac{4}{100}=0.04 m$

Horizontal velocity of the existing water stream= $v=\sqrt{2gh}$

Where $g=9.8m/s^2$

Using the formula

$v=\sqrt{2\times 9.8\times 0.04}=0.885m/s$

h'=l-h=15-4=11 cm= $\frac{11}{100}=0.11 m$

Initial velocity of water stream,u=0

$t=\sqrt{\frac{2h'}{g}}=\sqrt{\frac{2\times 0.11}{9.8}}=0.15 s$

Distance, d=vt

Using the formula

$d=0.885\times 0.15=0.133 m$

$d=0.133\times 100=13.3 cm\approx 13 cm$

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3 years ago

What are the fundamental units involved in pascal<br>

Llana [10]

Answer:

<h2>FUNDAMENTAL UNITS INVOLVED ARE : NEWTON AND SECOND .</h2>

<h2>FORMULA OF PRESSURE = </h2>

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3 years ago

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A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it’s average speed?

PIT_PIT [208]

Distance is 90km,time 1 hr
distance 2 is 82km,time 5 hrs
average speed=total distance travelled/total time taken.
90+82=172/5+1=6
average speed=28.7km over hour

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3 years ago

How much time passes, in seconds, from when the getaway car starts moving until you hear the explosion

Simora [160]

1 mile = 1609.344 meters 1 hour = 3600 seconds Initial speed of the getaway car = v1 = 0 m/s (At rest) Speed at which the getaway car explodes = v2 = 120 mph = 120 x (1609.344/3600) m/s = 53.…

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2 years ago