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IrinaK [193]
3 years ago
15

Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slid

e. If they both start at the same height above the ground, which of the following is true about their kinetic energies as they reach the ground?
A) Bob's kinetic energy is greater than Esther's.B) Esther's kinetic energy is greater than Bob's.C) They have the same kinetic energy.D) The answer depends on the shape of the slide.
Physics
1 answer:
galben [10]3 years ago
5 0

Answer:

Explanation:

They have the same kinetic energy

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BEING HONEST , OPTIMISTIC,DISCIPLINED, PUNCTUAL ,TRUTHFUL AND GOOD ORATOR(SPEAKER) , AND HOPEFUL ARE OTHER BASIC QUALITIES AN EFFECTIVE LEADER MUST POSSESS. ALSO,HE MUST NEVER DIFFERENCE BETWEEN ANY OF HIS FOLLOWERS OR DO PARTIALLY AT ANY TIME . HE SHOULD TREAT EVERY ONE EQUALLY.

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a person with a mass of 75kg jumps on the trampoline the trampoline creates a fprce of 375n on them what is the acceleration of
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Newton's second law allows calculating the response for the person's acceleration while leaving the trampoline is:

            -4.8 m / s²

Newton's second law says that the net force is proportional to the product of the mass and the acceleration of the body

            F = m a

Where the bold letters indicate vectors, F is the force, m the masses and the acceleration

The free body diagram is a diagram of the forces without the details of the body, in the attached we can see the free body diagram for this system

 

               F_t -W = m a

Whera F_t is the trampoline force

Body weight is

                W = mg

We substitute

              F_t - mg = ma

              a =\frac{F_t - m g}{m}

Let's calculate

              a = \frac{375 - 75 \ 9.8 }{75}

              a = -4.8 m / s²

The negative sign indicates that the acceleration is directed downward.

In conclusion using Newton's second law we can calculate the acceleration of the person while leaving the trampoline is

            -4.8 m / s²

Learn more here:  brainly.com/question/19860811

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Microwaves are a type of electromagnetic radiation, as are radio waves, ultraviolet radiation, X-rays and gamma-rays. Microwaves have a range of applications, including communications, radar and, perhaps best known by most people, cooking.Feb 8, 2018

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The answer is: A compound can be separated by physical means.
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Read 2 more answers
Ali was playing with his new U-shaped magnets which he attached with two trolleys and moved both of the trolleys in the same dir
jolli1 [7]

Answer:

The "trolleys" did not collide with each other because <em>their poles repelled. </em>

Explanation:

Magnets have poles located at their ends and these are the "north pole" and the "south pole."

If the north pole of one magnet will be faced to the south pole of another magnet, <em>they will attract each other</em> or <u>pull towards each other.</u> The opposite will happen when the south pole of one magnet will be faced with the same pole from another magnet. <em>They will repel each other</em> or<u> pull away from each other.</u>

Since the magnets attached to the trolleys were U-shaped, this means that the north and south poles are located at the<u> end of the magnets, which face the same direction. </u>So, once the magnets of the two trolleys move towards each other, their poles will repel because same poles will face each other.

So, this explains the answer.

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3 years ago
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