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
avanturin [10]
4 years ago
9

If you pull a resistant puppy with its leash in a horizontal direction, it takes 80 N to get it going. You can then keep it movi

ng at constant speed across the floor with a constant, horizontal force of 70 N. The puppy has a weight of 110 N. What is the coefficient of static friction between the puppy and the floor
Physics
1 answer:
netineya [11]4 years ago
5 0

Answer:

The coefficient of static friction between the puppy and the floor is 0.7273.

Explanation:

The horizontal force applied to move the puppy from a steady state has to be greater than the force of static friction, after it is moving the force needs to be equal to be greater than the force of dynamic friction in order to maintain its movement. The force of static friction is given by:

F_s = \mu_s*N

Where F_s is the static friction force, \mu_s is the coefficient of static friction and N is the normal force. Since there's no angle on the flor the normal force is equal to the weight of the puppy, therefore, N = 110\text{ N}, to make the puppy moving we need to use a force of 80 N, therefore, F_s = 80 \text{ N}, so we can solve for the coefficient as shown below:

80 = \mu_s*110\\\mu_s = \frac{80}{110} = 0.7273\\

The coefficient of static friction between the puppy and the floor is 0.7273.

You might be interested in
If there are no other changes, explain what effect reducing the mass of the car will have on its acceleration when starting to m
densk [106]

Answer:

when the mass of an object is decreased, the acceleration will increase

when mass is increased, acceleration decreases

3 0
3 years ago
Why is sky blue and why moon appear in daytime​
Elena L [17]

Answer:

The sky is blue because of the tiny molecules in the air and we see the moon in the day because the light of the sun is reflecting off the moon

Explanation:

Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white.

We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes. ... "When we see the moon during the day it's because the moon is in the right spot in the sky and it's reflecting enough light to be as bright, or brighter, than the sky."

4 0
3 years ago
Read 2 more answers
PLEASE HELP!
lana66690 [7]

Answer:

x = 4.32 [m]

Explanation:

We must divide this problem into three parts, in the first part we must use Newton's second law which tells us that the force is equal to the product of mass by acceleration.

∑F = m*a

where:

F = force = 700 [N]

m = mass = 2030 [kg]

a = acceleration [m/s²]

Now replacing:

F=m*a\\700=2030*a\\a = 0.344[m/s^{2}]

Then we can determine the final speed using the principle of conservation of momentum and amount of movement.

(m_{1}*v_{1})+Imp_{1-2}=(m_{1}*v_{2})

where:

m₁ = mass of the car = 2030 [kg]

v₁ = velocity at the initial moment = 0 (the car starts from rest)

Imp₁₋₂ = The impulse or momentum (force by the time)

v₂ = final velocity after the impulse [m/s]

(2030*0) + (700*5)=(2030*v_{2})\\3500 = 2030*v_{2}\\v_{2}=1.72[m/s]

Now using the following equation of kinematics, we can determine the distance traveled.

v_{2}^{2} =v_{1}^{2}+2*a*x

where:

v₂ = final velocity = 1.72 [m/s]

v₁ = initial velocity = 0

a = acceleration = 0.344 [m/s²]

x = distance [m]

1.72^{2}=0^{2} +(2*0.344*x) \\2.97 = 0.688*x\\x = 4.32 [m]

8 0
3 years ago
If the sum of all the forces acting on a moving object is zero, the object will:
natita [175]

Answer:

continue moving with constant velocity

Explanation:

4 0
2 years ago
Why are peer reviews important
Gre4nikov [31]

Answer: So they can find your mistakes that you made you skipped over

Explanation:

7 0
4 years ago
Read 2 more answers
Other questions:
  • If a wave has a wavelength of 9 M and a period Of 0.006 what is the velocity of the wave​
    13·2 answers
  • What will happen if our atmosphere was oxygen
    7·1 answer
  • A loop with a break in it that prevents current form flowing is called a(n) blank circuit
    14·1 answer
  • · A car moves at 12 m/s and coasts up a hill with a
    9·1 answer
  • Can you please help me with these 7 questions. (THEY ARE DUE TOMORROW)
    8·1 answer
  • A door has a height of 2.1 m along a y axis that extends vertically upward and a width of 0.975 m along an x axis that extends o
    8·1 answer
  • The following 1H NMR absorptions were obtained on a spectrometer operating at 200 MHz and are given in Hz downfield from TMS. Co
    14·1 answer
  • If you could help me please.
    14·1 answer
  • What is the average speed of the car that traveled a total of 30.00 kilometers in 5 hours and thirty minutes
    8·1 answer
  • Please help!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!