PHYSICS HIGH SCHOOL

3. You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy tourist guidebook you find that the height of the Eiffel Tower is 300.5 m. If you neglect air resistance, calculate how many seconds the croissant dropped before it tagged you on the head.

Answers

Answer 1
Answer:
As absurd as the concept is, we must assume that a croissant
can fall 300.5 meters through the moisture-laden, perfumed and
polluted Parisian air with no air resistance whatsoever.

Acceleration due to gravity on Earth:  9.8 m/s²

Distance in clean,
unimpeded free-fall         = (1/2) (acceleration) x (time²) 

                                            300.5 m  =  (1/2)  (9.8 m/s²) (T²)
Divide each side
by (4.9 m/s²):                  (300.5 m) / (4.9 m/s²)  =  T²

Take the square root
of each side:                     T = √(300.5/4.9) (s²)

                                                               =  7.831 seconds .

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Beth has built a simple series circuit using wire, a battery, a lightbulb, and a switch. The bulb, however, does not light up when the switch is closed. Which describes a step that will help troubleshoot and work toward the solution of this problem?

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Answers

The right answer for the question that is being asked and shown above is that: "A. Reverse the way the wire is connected to the poles of the battery." the statement describes a step that will help troubleshoot and work toward the solution of this problem is that Reverse the way the wire is connected to the poles of the battery.

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Answers

Answer:

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Explanation:

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because the snow suddenly gets too slushy, you decide to carry your 100-newton sled the rest of the way home. How much workdo you you do when you pick up your sled, lifting it 0.5meter upward? How much work do you do to carry the sled if your house is 800 meters away?

Answers

You do 50 Joule work when you pick up your sled, lifting it 0.5meter upward.

You do no work to carry the sled to your home.

What is work?

Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. For a constant force acting in the same direction as the motion, the work is simply equal to the product of the force's magnitude and the distance travelled.

When a force is applied, it is said to have a component that moves the point of application, or it is said to have positive work.

Hence, lifting it 0.5meter upward, you have to work = weight of the sled × distance × cos 0°

= 100 N × 0.5 meter × 1

= 50 Joule.

To carry the sled to your home,  you have to work = weight of the sled × distance × cos 90°

= 100 N × 800 m × 0

= 0.

Learn more about work here:

brainly.com/question/18094932

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When you lift it the work is 50 joules. When heading home the work is 80000joules
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