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hammer [34]
3 years ago
6

our 3.80-kg physics book is placed next to you on the horizontal seat of your car. The coefficient of static friction between th

e book and the seat is 0.650, and the coefficient of kinetic friction is 0.550. You are traveling forward at 72.0 km/h and brake to a stop with constant acceleration over a distance of 30.0 m. Your physics book remains on the seat rather than sliding forward onto the floor. Is this situation possible
Physics
1 answer:
gtnhenbr [62]3 years ago
4 0

Answer:

Explanation:

Maximum force of friction possible = μmg

= .65 x 3.8 x 9.8

= 24.2 N

u = 72 x 1000 / 60 x 60

= 20 m /s

v² = u² - 2as

a = 20 x 20 / (2 x 30)

= 6.67 m / s²

force acting on it

= 3.8 x 6.67

= 25.346 N

Friction force possible is less .

So friction will not be able to prevent its slippage

It will slip off .

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Answer:

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5 0
3 years ago
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givi [52]
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. Two identical vehicles traveling at the same speed are made to collide with barriers in an insurance company collision test. T
Serggg [28]

Answer:

F₁ / F₂ = 10

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Explanation:

For this exercise let's use the relationship between momentum and momentum.

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in order to answer the question we must assume that the two vehicles have the same mass and speed

concrete barrier

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5 0
3 years ago
Three resistors of 100 W, 3900 W, and 1000 W are connected in series across a 200-V battery. What is the voltage drop across the
Gala2k [10]

Answer:

40 V

Explanation:

 I will assume that  the resistors are

           100 and 3900 and 1000 OHMS    <=====(NOT W)

In series , the resistances add together 100 + 3900 + 1000 = 5000 ohms total

V = IR

I = V / R      so the total current will be   200 v / 5000 ohms = .04 amps

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      so for the   1000 ohm resistor     V = IR     .04 (1000) = 40 V

7 0
2 years ago
What is the surface area of an object weighing 100M which exerts a pressure of 20nm-2​
vovangra [49]

lovely question hope 7 solve it

Explanation:

‍‍

6 0
3 years ago
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