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taurus [48]
3 years ago
9

Kenny, who has a mass of 15 kg, slides down a friction-less slide that is 3.2 m tall. Cartman, who has a mass of 85 kg, slides d

own the same slide.
A. What speed does Kenny reach at the bottom of the slide?
B. What speed does Cartman reach the bottom of the slide?
C. Kyle slides down the same slide. What speed does Kyle reach at the bottom of the slide? Explain.
Physics
1 answer:
Anika [276]3 years ago
8 0

<u>a).</u>
Kenny's potential energy at the top becomes kinetic energy at the bottom.
                          
                                               (M G H) = 1/2 (M V²)

Divide each side by 'M':                 G H = 1/2  V²

Multiply each side by  2:              2 G H = V²

Take the square root of each side:    V = √(G H)

                                                             = √(9.8 x 3.2) = <em><u>5.6 m/s .</u></em>

<u>b).</u>
Notice in the solution for a). that each side of the equation was divided
by 'M'.  The answer didn't depend on Kenny's mass, and it doesn't depend
on Cartman's mass either.  Cartman and Kenny are both moving at the
same speed when they reach the bottom.

<u>c).</u>
Notice in the solution for a). that each side of the equation was divided
by 'M'.  The answer didn't depend on Kenny's mass.  It didn't depend on
Cartman's mass either, and it doesn't depend on Kyle's mass either, either. 
Each of them is moving at the same speed when he reaches the bottom.
The same also applies to girls as well, too.


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The sum of the charges on both plates of a capacitor is zero. What does a capacitor store?
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<h3>What is capacitor?</h3>

A capacitor is an electronic component that stores an electrical charge. Capacitors consist of two close conductors (usually plates) separated by a dielectric material. The plates accumulate an electrical charge when connected to a power source. The main purpose of a capacitor is to store electrostatic energy in an electric field and, if possible, to supply this energy to an electrical circuit.

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4 0
1 year ago
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

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