PHYSICS MIDDLE SCHOOL

What does the path of an object look like when it is in uniform motion ?

Answers

Answer 1
Answer: In uniform motion, the path is a straight line, and the object r moving along it at a constant speed.

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Answers

Answer:

idk

Explanation:

In which of these situations, is mechanical energy being conserved? (Neglect, air resistance, friction and breaking) Check all that apply.Child on a swing


Pendulum


Bow and Arrow


Roller Coaster

Answers

Answer:

Neglecting, air resistance, friction and breaking, all the condition has conservation of mechanical energy.

Explanation:

  • The law of conservation of mechanical energy suggests that the mechanical energy in a locked system with out any destructive forces like friction or air resistance remains always the same (constant).
  • The energy may be converted between kinetic energy, potential energy, gravitational potential but energy do not get decreased in any cases as mentioned in the option.
  • So all the cases mentioned above shows the conservation pattern of mechanical energy.

Galileo conducted controlled experiments to find out if the mass of the pendulum bob affected the period of the swing. Write a description of how he might design his experiment. Thanks!

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According to my guesses, he should have swung the pendulam bob and noted its time period. In order to observe the effect of mass, he would have repeated the experiment with varied pendulam bobs. Hope this helped! 

A light shines up from the bottom of a fish pond.Which diagram shows the correct path of light as it leaves the water of the pond and hits the air?

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For the question "A light shines up from the bottom of a fish pond. Which diagram shows the correct path of light as it leaves the water of the pond and hits the air?" The second diagram is the correct answer. Water has a higher refractive index than air so the ray of light passing from water to air will be refracted away from the normal (the vertical) towards the surface of the water.

Label the three forms of energy represented in this image

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Answer:

Where is this image?
The image is not showing up.

A biker accelerates from Om/s to 8m/s ub 3 seconds. What is his acceleration? Isthis acceleration higher than that of a car wihich accelerates from 0 to 30m/s in
8 seconds

Answers

Answer:

The acceleration of the biker is 2.67m/s² while that of the car is 3.75m/s². So, the acceleration of the biker is NOT HIGHER than that of the car.

Explanation:

Given that,

acceleration of biker A= ?

Initial velocity of biker Vi = Om/s

Final velocity of biker Vf = 8m/s

Time taken (t) = 3 seconds

Since acceleration is the rate of change of velocity per unit time

i.e Acceleration = (Vf - Vi) / t

A = (8m/s - 0m/s) / 3s

A = 2.67 m/s²

To know which is higher, calculate the acceleration of the car

acceleration of car A= ?

Initial velocity of car Vi = Om/s

Final velocity of car Vf = 30m/s

Time taken (t) = 8 seconds

Acceleration = (30m/s - 0m/s) / 8s

A = 30m/s / 8s

A = 3.75 m/s²

Since, the acceleration of the biker is 2.67m/s² while that of the car is 3.75m/s², the acceleration of the biker is NOT HIGHER than that of the car.

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