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creativ13 [48]
3 years ago
11

You want to slide a 0.39 kg book across a table. If the coefficient of kinetic friction is .21, what force is required to move t

he book with an acceleration of 0.18 m/s^2?
Physics
1 answer:
uranmaximum [27]3 years ago
5 0
Find the force that would be required in the absence of friction first, then calculate the force of friction and add them together.  This is done because the friction force is going to have to be compensated for.  We will need that much more force than we otherwise would to achieve the desired acceleration:

F_{NoFric}=ma=0.39kg \times0.18 \frac{m}{s^2}  =0.0702N

The friction force will be given by the normal force times the coefficient of friction.  Here the normal force is just its weight, mg

F_{Fric}=0.39kg \times 9.8 \frac{m}{s^2} \times 0.21=0.803N

Now the total force required is:

0.0702N+0.803N=0.873N

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Explanation:

There are two components of a longitudinal sound wave which are compression and rarefaction. Similarly, there are two components of the transverse wave, the crest, and trough.

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While compression is that space where the particles are close together while the rarefaction is that space where the particles are far apart from each other.

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How many joules of electrical energy is transferred per second by 6V 0.5 A lamp?
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Electrical power = (voltage) x (current) =

                              (6 volts) x (0.5 ampere) =

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An obiect of mass weighing 5,24 k acceleration due to gravity is 9 8 meters/second2 is raised to a height of 1.63 meters. What i
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A scientist measures the growth of a bamboo plant over time. The table above shows the results. What is the best interference fo
lisabon 2012 [21]

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<u>Explanation:</u>

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At 40 hours, the height of the bamboo plant is 2.1cm

At 50 hours, the height of the bamboo plant is 2.4cm

Height of the bamboo plant after 45 hours = ?

The difference in length from 40 to 50 hours = 2.4 - 2.1cm

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Therefore, the height of the plant after 45 hours is 2.25cm

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3 years ago
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