1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kozerog [31]
4 years ago
8

Suppose that you are standing on a train accelerating at 0.20g. What minimum coefficient of static friction must exist between y

our feet and the floor if you are not to slide.

Physics
2 answers:
Ilia_Sergeevich [38]4 years ago
5 0
Acceleration = (0.2 x g) = 1.96m/sec^2. 
<span>Accelerating force on 1kg. = (ma) = 1.96N. </span>
<span>1kg. has a weight (normal force) of 9.8N. </span>
<span>Coefficient µ = 1.96/9.8 = 0.2 minimum. </span>

<span>Coefficient is a ratio, so holds true for any value of mass to find accelerating force acting. </span>
<span>e.g. 75kg = (75 x g) = 735N. </span>
<span>Accelerating force = (735 x 0.2) = 147N</span>
BigorU [14]4 years ago
5 0

The coefficient of static friction between the feet and the floor is \boxed{0.2}.

Further explanation:

Here, we have to calculate the coefficient of static friction between the feet and the floor.

Given:

The acceleration of the train is 0.2g.

Concept:

As we know, the friction occurs between the two surface when there is a relative motion of the one surface or body over the other surface.

Maximum friction force is the limiting friction and its value is equal to the product of the coefficient of the static friction and the normal reaction.

So, friction force can be calculated as,

\boxed{{F_r}=\mu mg}

Here, m is the mass of the observer, \mu is the coefficient of static friction,

Here, according to thequestion, in the given condition, the observer (you) will not slide until observer try to slide.

Therefore, if the observer does not slide relative to the surface of the train, it means that the acceleration of the observer is same as that of the acceleration of the train.

So, acceleration of the observer will be equal to the acceleration of the train.

\boxed{a=0.2g}

Here, a is the acceleration of the observer (you).

We know that, when an object accelerates then the inertia force experienced by the object in the opposite direction of the acceleration.

So, inertia force will be,

{F_I} = ma

So, by applying the equilibrium condition,

{F_r} = {F_I}

Substitute the value of {F_r} and {F_I} in the above equation.

\begin{aligned}\mu mg&=ma\\\mu mg&=m\left( {0.2g} \right)\\\mu g&=0.2g\\\mu&=0.2\\\end{aligned}

Thus, the coefficient of static friction between the feet and the floor is \boxed{0.2}.

Learn more:

1. Stress in the bungee cord: brainly.com/question/12985068

2. To calculate broadcast wavelength of radio station: brainly.com/question/9527365

Answer detail:

Grade: Senior School

Subject: Physics

Chapter: Kinematics

Keywords:

Standing, train, accelerating, coefficient of the static friction, not slide, mg, umg, moving, relative motion, surface, friction force.

You might be interested in
PLEASE HELP ASAP I'LL GIVE BRAINLY!!
andrew-mc [135]

Answer:   b or c

Explanation:  on khan academy

5 0
3 years ago
Work is a transfer of (1 point) energy. force. mass. motion.
jok3333 [9.3K]
Energy is the ability to do work.

So work can not be done without the transfer of energy from one body to another.

Work is the transfer of energy.
6 0
3 years ago
Read 2 more answers
A Honda Civic travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the e
andrew-mc [135]
Average velocity = (x( 2.08 ) - x ( 0 )) / ( 2.08 s - 0 s )
x ( 2.08 ) = 1.42 * 2.08² - 0.05 * 2.08³ =
= 1.42 * 4.3264 - 0.443456 = 6.143484 - 0.443456 ≈ 5.7 m
v = ( 5.7 m - 0 m) / (2.08 s - 0 s ) = 5.7 / 2.08 m/s = 27.4 m/s
3 0
3 years ago
A train travels 67 kilometers in 1 hours, and then 81 kilometers in 5 hours. What is its average speed?
Naddika [18.5K]
Answer: 24.7 km/h

Explanation:

1) Average speed definition and formula

The average speed is the total distance run divided by the time elapsed:

S = distance / time

2) Distance 1 = 67 km

3) Distance 2 = 81 km

4) Total distance traveled = 67 km + 81 km = 148 km

5) time 1 = 1 hour

6) time 2 = 5 hours

7) total time = time 1 + time 2 = 1 h + 5 h = 6 h

8) Average speed:

S = 148 km / 6 h = 24.7 km/h


4 0
3 years ago
Evidence that the cosmic background radiation really is the remnant of a Big Bang comes from predicting characteristics of remna
mario62 [17]

Answer:

B) The cosmic background radiation is expected to contain spectral lines of hydrogen and helium, and it does.

Explanation:

3 0
3 years ago
Other questions:
  • sugar solution does not change the colour of green universal indicator what does this tell you about sugar solution
    15·1 answer
  • Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several ob
    8·1 answer
  • A box slides down a frictionless ramp.if it starts at rest, what is it’s speed at the bottom?
    10·1 answer
  • A 25 pF parallel-plate capacitor with an air gap between the plates is connected to a 100 V battery. A Teflon slab (dielectric c
    13·1 answer
  • A beaker of ice and water is placed on a hot plate. is it a physical or chemical change
    11·1 answer
  • A heat engine is designed to do work. This is possible only if certain relationships between the heats and temperatures at the i
    10·2 answers
  • Gary needs to move a chair that is 20 pounds at a distance of 5 feet. How much work will he need to produce?
    6·2 answers
  • Which of the following is an example of acceleration?
    14·2 answers
  • A child's first bicycle has 12-inch tires. These tires have a 6-inch radius. How fa r does the bicycle move forward each time th
    10·1 answer
  • On an aircraft carrier, a jet can be catapulted from 0 to 250 km/h in 2.05 s
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!