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docker41 [41]
3 years ago
8

Describe two examples of activities that you do where you depend on friction, and would not be able to do them without friction.

Physics
1 answer:
kaheart [24]3 years ago
7 0

Answer: One is when a bike stops. The other is when you rub your hands together to get warm.

Explanation: Force and friction affect our daily lives in numerous amounts of ways. For instance, when a football is kicked, it moves faster later after some time its force decreases due to friction. A common example of friciton is when a bike stops. When the brakes are applied the friction on the pads cause the bike to stop. The other is because you are getting warm with friction.

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What is the current in a 160V circuit if the resistance is 2Ω?<br> V=<br> I=<br> R=
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3 years ago
Assuming typical speeds of 8.5 km/s and 5.5 km/s for P and S waves, respectively, how far away did the earthquake occur if a par
taurus [48]

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The earthquake occurred at a distance of 1122 km

Explanation:

Given;

speed of the P wave, v₁ = 8.5 km/s

speed of the S wave, v₂ =  5.5 km/s

The distance traveled by both waves is the same and it is given as;

Δx = v₁t₁ = v₂t₂

let the time taken by the wave with greater speed = t₁

then, the time taken by the wave with smaller speed, t₂ = t₁ + 1.2 min, since it is slower.

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t₁(v₁ - v₂) = 72v₂

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Δx = 1122 km

Therefore, the earthquake occurred at a distance of 1122 km

4 0
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