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Doss [256]
3 years ago
8

Which is an example of sliding friction?

Physics
2 answers:
givi [52]3 years ago
6 0

The correct answer is C, applying brakes on a bike

Anvisha [2.4K]3 years ago
4 0
I think its D not sure
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Rock at the top of a 20 m tall hill the rock has a mass of 10 kg how much potential energy does it have
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PE = 10 * 10 * 20 = 2000 Joule
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A train locomotive is pulling two cars of the same mass behind it. Determine the ratio of the tension in the coupling (think of
Anna007 [38]

Answer:

The ratio is  \frac{F_{T1}}{F_{T2}}  =  2

Explanation:

The diagram for this question is shown on the first uploaded image

Here we are assume the acceleration of the train is a

which makes the acceleration of each car a

From the question we are told that

      Considering the second car

 The force causing it s movement  is mathematically represented as

       F_{T2} =  ma

 Considering the first car

 The force causing it s movement  is mathematically represented as

      F  = F_{T1} -F_{T2} = ma

=>   F_{T1} -ma  = ma

=>   F_{T1} =  2 ma

=> \frac{F_{T1}}{ma}  =  2

=> \frac{F_{T1}}{F_{T2}}  =  2

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EastWind [94]

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We have to choose the satellite having greatest gravitational force with earth. In all options the distance from the earth is same i.e. 320 km. So, we have to select the satellite having maximum mass because the mass of the earth is constant.

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