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Juliette [100K]
3 years ago
5

A cat rolls up a hill. It’s initial Velocity is 10 m/s.n It’s final velocity is 0 m/s. The time was five seconds. Calculate Acce

leration
Physics
1 answer:
aleksklad [387]3 years ago
6 0

Answer:

\boxed {\boxed {\sf a= -2 \ m/s^2}}

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

a=\frac{v_f-v_i}{t}

The final velocity of the cat was 0 meters per second and the initial velocity was 10 meters per second. The time was 5 seconds.

v_f=0 \ m/s\\v_i=10 \ m/s\\t= 5 \ s

Substitute the values into the formula.

a=\frac{0 \ m/s-10 \ m/s}{5 \ s}

Solve the numerator.

  • 0 m/s-10 m/s= -10 m/s

a=\frac{-10 \ m/s}{5 \ s}

Divide.

a= -2 \ m/s^2

The acceleration of the cat was -2 m/s². The negative acceleration indicates slowing down or stopping.

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Which of the following best describes why we say that light is an electromagnetic wave?
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Explanation:

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4 years ago
It has been suggested that rotating cylinders several miles in length and several miles in diameter be placed in space and used
stepladder [879]

Answer:

the required revolution per hour is 28.6849

Explanation:

Given the data in the question;

we know that the expression for the linear acceleration in terms of angular velocity is;

a_{c} = rω²

ω² = a_{c} / r

ω = √( a_{c} / r )

where r is the radius of the cylinder

ω is the angular velocity

given that; the centripetal acceleration equal to the acceleration of gravity a a_{c}  = g = 9.8 m/s²

so, given that, diameter = 4.86 miles = 4.86 × 1609 = 7819.74 m

Radius r = Diameter / 2 = 7819.74 m / 2 = 3909.87 m

so we substitute

ω = √( 9.8 m/s² / 3909.87 m )

ω = √0.002506477 s²  

ω = 0.0500647 ≈ 0.05 rad/s  

we know that; 1 rad/s = 9.5493 revolution per minute

ω = 0.05 × 9.5493 RPM

ω = 0.478082 RPM  

1 rpm = 60 rph  

so  

ω = 0.478082 × 60

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3 years ago
In the diagram below astronauts on different planets are dropping apples.
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Answer:

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4 0
3 years ago
Read 2 more answers
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