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Artist 52 [7]
3 years ago
8

A crate of books rests on a level floor. To move it along the floor at a constant velocity, why do you exert less force if you p

ull it at an angle Ï above the horizontal than if you push it at the same angle below the horizontal?
Physics
1 answer:
Mademuasel [1]3 years ago
8 0

Answer:should be a matter of vector analysis.

Pulling above the horizontal has less surface area for the opposing friction

Explanation:

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harkovskaia [24]
Very simple,Its all about calculating distance using the formula:
D = V x T
where,
V is the speed or velocity
D is distance
T is the time
In the given problem,there are two parts.
Lets do the calculations for both parts separately:
Part 1) Before the rain
Time = 130/95
         = 1.37 hours <span> </span>
<span>Time taken after the rain = Total time - time taken before the rain  </span>
<span>                                        = 3.34 hours - 1.37 hours
                                        = 1.97 hours </span>
<span>Distance covered after the rain = 1.97 hours x 65 km/h
                                                  = 128 km</span>
Hence,
<span>a) The total distance covered =  130 + 128
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</span><span>b) Average speed = Total distance/Total time
                             =  260/3.34
                             = 78 km/h </span>
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Answer:

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-- If the new wave has larger displacements (amplitude), then it's <em>CON</em>structive interference.

-- If the new wave has smaller displacements (amplitude), then it's DEstructive interference.

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Answer:

Explanation:

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