3 years ago

A car travels 98 km. It takes 34.92 minutes to complete the trip. What was the average speed?

Physics

1 answer:

Dafna1 [17]3 years ago

5 0

The answer is 66,460 milliseconds

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4 years ago

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a fan acquires a speed of 180 rpm in 4s, starting from rest. calculate the speed of the fan at the end of the 5th second startin

KengaRu [80]

Answer:

225 rpm

Explanation:

The angular acceleration of the fan is given by:

$\alpha = \frac{\omega_f - \omega_i}{\Delta t}$

where

$\omega_f$ is the final angular speed

$\omega_i$ is the initial angular speed

$\Delta t$ is the time interval

For the fan in this problem,

$\omega_i = 0\\\omega_f = 180 rpm\\\Delta t=4 s$

Substituting,

$\alpha = \frac{180-0}{4}=45 rpm/s$

Now we can find the angular speed of the fan at the end of the 5th second, so after t = 5 s. It is given by:

$\omega' = \omega_i + \alpha t$

where

$\omega_i = 0\\\alpha = 45 rpm/s\\t = 5 s$

Substituting,

$\omega' = 0 + (45)(5)=225 rpm$

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3 years ago

From Earth to the center of our galaxy is about 300,000 light years, meaning that light coming from a star in the center of our

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</span>

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A skateboarder starts from rest and maintains a constant acceleration of 0.50 m/s² for 8.4 s. What is the rider's displacement d

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2 years ago

A cyclist has a constant speed of 12 m/s. What is the magnitude of the displacement of the cyclist after 18 seconds?

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Answer:

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Assuming a straight line:

Δx = vt

Δx = (12 m/s) (18 s)

Δx = 216 m

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3 years ago