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4 years ago

An object has a mechanical energy of 1575 J and a potential energy of 1265 J.

Physics

1 answer:

laila [671]4 years ago

5 0

A. 1575 - 1265 = 310J

B. KE 1/2 MV^2

V=√2·KE/M = √2(310)/12 V = 7.2mls

C. PE = 1265 = mgh

h= 1265/mg = 1265/(12)(92) h= 10.8m

A. KE = 1/2 mv^2 0.5(5)(12)^2 KE = 360J

B. PE = mgh = (5)(9.8)(2.6) PE = 127.4J

C. ME = KE + PE = 360 + 127.4 ME = 487.4J

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Answer:

A= 150 J

Explanation:

Kinetic energy is the energy of an object in motion.

The formula for kinetic energy is ;

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Work done is equal to change in kinetic energy

W= Δ K.E

Given that K.E = 150 J

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3 years ago

Two charges are located in the xx–yy plane. If q1=−4.10 nCq1=−4.10 nC and is located at (x=0.00 m,y=1.080 m)(x=0.00 m,y=1.080 m)

Gala2k [10]

Answer:

Explanation:

Due to first charge , electric field at origin will be oriented towards - ve of y axis.

magnitude

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Due to second charge electric field at origin

= 8.99 x 10⁹ x 3.6 x 10⁻⁹ / 1.2²+ .6²

= 8.99 x 10⁹ x 3.6 x 10⁻⁹ / 1.8

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Total field

= - 16.10 i - 8.04 j + ( - 31.6 j )

= -16.1 i - 39.64 j .

Ex = - 16.1 i

Ey = - 39.64 j .

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Nearsightedness (myopia) makes far-away objects look blurry.
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Presbyopia makes it hard for middle-aged and older adults to see things up close

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