3 years ago

Which is not true about the particles in a plastic spoon

Physics

1 answer:

laila [671]3 years ago

3 0

Answer: What are the answer options?

Explanation:

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Vector A and B are in the xy plane where A is 3.2m at 45° to the positive x axis and B is 2.4m at 290° to positive x axis. Deter

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hah, YOU JUST GOT

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Lizard: A lizard is running in a straight line according to the following: xx(tt) = tt3⁄3 − tt2 + tt He starts at tt = 0. (a) De

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Answer:

Explanation:

a ) x ( t ) = t³ / 3 - t² + t

v = dx / dt = 3 t² / 3 - 2 t + 1 = t² - 2 t + 1

b ) lizard is at rest , v( t ) = 0

t² - 2 t + 1 = 0

( t - 1 )² = 0

t = 1

c )

velocity is positive when

t² - 2 t + 1 > 0

( t - 1 ) ² > 0

Here we see that LHS is a square so it is always positive whatever be the value of t

So velocity is always positive or lizard is always moving in positive x direction .

d ) It never moves in negative x direction .

e )

a ( t ) = dv / dt = 2t - 2

t = 1

so it has zero acceleration at t = 0 .

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3 years ago

A force of 15 newtons is applied to both Object A with a mass of 25 kilograms and Object B with a mass of 50 kilograms. What is

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What will most likely happen if a light wave moves from the air into a solid? A) It will increase in wavelength. B) It will decr

daser333 [38]

Answer:

it will decrease speed

Explanation:

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3 years ago

A student is bicycling north along Main Street to school. Another student is timing the bicycling student in order to determine

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The average velocity is -4.17 m/s

Explanation:

The average velocity of a body is given by:

$v=\frac{d}{t}$

where

d is the displacement of the body

t is the time elapsed

For the student in this problem, we have:

Initial position: $x_i = 450 m$

Final position: $x_f = 200 m$

So the displacement is

$d=x_f -x_i = 200 - 450 = -250 m$

The time elapsed is

t = 60 s

Therefore, the average velocity is

$v=\frac{-250}{60}=-4.17 m/s$

Where the negative sign means the student is moving towards the origin.

Learn more about average speed and velocity:

brainly.com/question/8893949

brainly.com/question/5063905

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