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3 years ago

A car traveling at 60 mph has how much more energy than a car going at 15 mph?

Physics

1 answer:

Liono4ka [1.6K]3 years ago

6 0

4. KE increases by a factor of 16 is the answer

Explanation:

Kinetic energy = (1/2)mv² = 0.5 mv²

where

m = mass, and v = velocity.

So at 15 mph,

K E = 0.5 m (15) ² = 112.5 m

And at 60 mph,

K E = 0.5 m (60)² = 1800 m

m is the mass, and not meters.

So, 1800 m/112. 5 m = 16

16 times the Kinetic Energy.

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A certain frictionless simple pendulum having a length l and mass m swings with period t. If both l and m are doubled, what is t

iVinArrow [24]

If l and m both are doubled then the period becomes √2*T

what is a simple pendulum?

It is the one which can be considered to be a point mass suspended from a string or rod of negligible mass.

A pendulum is a weight suspended from a pivot so that it can swing freely.

Here,

A certain frictionless simple pendulum having a length l and mass m

mass of pendulum = m

length of the pendulum = l

The period of simple pendulum is:

$T = 2\pi \sqrt{\frac{l}{g} }$

Where k is the constant.

Now the length and mass are doubled,

m' = 2m

l' = 2l

$T' = 2\pi \sqrt{\frac{2l}{g} }$

$T' = \sqrt{2}* 2\pi \sqrt{\frac{l}{g} }$

$T' = \sqrt{2} * T$

Hence,

If l and m both are doubled then the period becomes √2*T

Learn more about Simple Harmonic Motion here:

brainly.com/question/17315536

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1 year ago

Active immunity is passed on from a mother to her baby.

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True.The immune system in babies. Antibodies are passed from mother to baby through the placenta during the last three months of pregnancy.

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2 years ago

Which statements accurately describes the waste generated by nuclear reactions ? check all that apply.

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A) its 's hazardous for hundreds to thousand of year B) Some waste can be recycled and used again is the answer

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3 years ago

A mobile phone is 35% efficient. Over half an hour 11 kJ of energy is transferred to the phone.

kramer

<h3>Answer:-</h3>

Energy Transferre=11KJ
Efficiency=35%

<h3>☆Usefully transferred energy:-</h3>

$\\ \sf\longmapsto 35\%\:of 11$

$\\ \sf\longmapsto 35\%\times 11$

$\\ \sf\longmapsto \dfrac{35}{100}\times 11$

$\\ \sf\longmapsto \dfrac{385}{100}$

$\\ \sf\longmapsto 3.85KJ$

$\\ \sf\longmapsto 3850J$

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2 years ago

CAN SOMEONE PLEASE HELP ME

VLD [36.1K]

Answer:

she will eventually slow down and come to a stop

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2 years ago

Read 2 more answers