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lions [1.4K]
4 years ago
6

Why does the cyclist have less kinetic energy at position A than at position B?

Physics
1 answer:
g100num [7]4 years ago
7 0

the answer is A. Their is less friction between the tire and the road at position A than at position B.

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Deprecion como la ejerzo
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8 0
3 years ago
A motorcycle is moving at a constant speed of 45km/h how long does it take the motorcycle to travel a distance of 20km?
harina [27]

Answer:

It takes 1600 seconds or \frac{4}{9} hours to travel a distance of 20 km.

Explanation:

Given:

Speed of the motorcycle, v=45\textrm{ km/h}

Distance traveled by the motorcycle, D=20\textrm{ km}

We know that,

Distance = \frac{Speed}{Time}

∴ Time =\frac{Distance}{Speed}=\frac{D}{v}

Plug in 20 km for D and 45 km/h for v. Solve for time.

⇒ Time = \frac{20}{45}=\frac{4}{9}\textrm{ h}=\frac{4}{9}\times 3600=1600\textrm{ s}

Therefore, the time taken to travel a distance of 20 km is 1600 seconds or \frac{4}{9} hours.

3 0
3 years ago
Which of the following is NOT accelerating?
ivolga24 [154]
I would say the answer to your question is A Ferris wheel turning at a constant speed. The reasoning behind this answer is the fact that traveling in a constant direction at a constant speed is not accelerating. The Ferris wheel is the only option that fits this description. The last option would be incorrect due to independent causes such as speed limit changes as well as turns and stops on the highway.
7 0
3 years ago
A race car starts from rest and accelerates uniformly to 69 mph in 4.5 s.
Marizza181 [45]
For this question we should apply
a = v^2 - u^2 by t
a = 69 - 0 by 4.5
a = 69 by 4.5
a = 15.33
a = 6.85 m/s^2

If the answer in option is near to answer then , you can mark it as correct.
.:. The acceleration is 6.9 m/s^2
5 0
3 years ago
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