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DIA [1.3K]
3 years ago
8

A kid is on a stationary sled,on snowy ground with Us=0.125. It takes 71.2N of force to get the sled moving. How much normal for

ce is acting?
Physics
2 answers:
andriy [413]3 years ago
8 0

Answer:

570 N

Explanation:

Friction = normal force × coefficient of friction

F = Nμ

71.2 = N (0.125)

N = 569.6

Rounded to 3 significant figures, the normal force is 570. N.

Akimi4 [234]3 years ago
4 0

Correct Answer:

570 N

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Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence
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Answer:

1) Recollapsing universe

2) critical universe

3) Coasting universe

Explanation:

According to the smallest ration (ratio actual mass density to current density) to largest ration, rank of models for expansion of universe are

1) Recollapsing universe -in this, metric expansion of space is reverse and universe recollapses.

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Sonic boom from a plane is an example of a shockwave. Give another example where a shockwave is produced
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Sonic boom can also be created from an atomic bomb going off.
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4 years ago
In triangle​ ABC, the angles A and B have the same​ measure, while the measure of angle C is 21degrees larger than the measure o
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180 = 2x+x+21
159 = 3x
x = 53
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3 years ago
Who discovered electromagnetic induction?
allsm [11]

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4 years ago
An electric motor exerts a constant torque of 10 Nm on a grindstone mounted on its shaft. The moment of inertia of the grindston
Dmitry_Shevchenko [17]

Answer:

Angular acceleration = 5 rad /s ^2

Kinetic energy = 0.391 J

Work done = 0.391 J

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Explanation:

The torque is given as moment of inertia × angular acceleration

angular acceleration = torque/ moment of inertia

= 10/2= 5 rad/ s^2

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w = angular acceleration/time

=5/8= 0.625 rad /s

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The work done is equal to the kinetic energy of the motor at this time

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P = 6.25 W

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4 years ago
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