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ki77a [65]
3 years ago
12

If you run a complete loop around an outdoor track of length 400 m in 100 s, find your(a) average velocity and (b) average speed

. *
Physics
1 answer:
laila [671]3 years ago
5 0

Answer:

a) 0 m/s

b) 4 m/s

Explanation:

The average velocity would end up being 0 because it is displacement over time and the displacement here is 0. However, speed is total distance over time which here is 400/100 so it is 4.

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A tennis ball travelling at a speed of 46m/s with a mass of 58kg. Calculate the kinetic<br>energy​
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Answer:

Option A

Explanation:

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GaryK [48]

Answer:

3.1 m/s

Explanation:

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3 years ago
A centrifuge in a medical laboratory rotates at an angular speed of 3,500 rev/min, clockwise (when viewed from above). When swit
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Answer:

The magnitude of angular acceleration is 232.38\ rad/s^2.

Explanation:

Given that,

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When it switched off, it comes o rest, \omega_f=0

Number of revolution, \theta=46=289.02\ rad

We need to find the magnitude of angular acceleration. It can be calculated using third equation of rotational kinematics as :

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