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
marshall27 [118]
3 years ago
8

We push a 38.4-kg box across the floor at constant velocity. If we are pushing a horizontal force of 238 N, find the coefficient

of kinetic friction between the box and the floor.
Physics
1 answer:
zmey [24]3 years ago
5 0

Answer: 0.62

Explanation:

Coefficient of friction is defined as the ratio of the moving force (Fm) acting on a body to the normal reaction (R).

Note that the normal reaction acts vertically on the object and is equal to the objects weight (W) i.e W=R

Since W = mg, W = 38.4 ×10

W= 384N =R

Normal reaction = 384N

The horizontal force acting on the body will be the moving force which is 238N

Coefficient of friction = Fm/R

Coefficient of friction = 238/384

Coefficient of friction = 0.62

Therefore, coefficient of kinetic friction between the box and the floor is 0.62

You might be interested in
Instructions Write a program that inputs the length of two pieces of fabric in feet and inches (as whole numbers) and prints the
diamong [38]

Answer:

The code is written in python in the explanation section below

Explanation:

a_feet = int(input("Input the feet of the first fabric: "))

a_inches = int(input("input the size in inches for the first piece of fabric: "))

b_feet = int(input("input the size in Feet for the second piece of fabric: "))

b_inches = int(input("Enter the size in Inches for the second piece of fabric: "))

sum_inches = a_inches + b_inches

inches_to_feet = sum_inches // 12

rem_from_div = sum_inches % 12

sum_feet = a_feet + b_feet + inches_to_feet

print("Feet: {} Inches: {}".format(sum_feet, rem_from_div))

4 0
3 years ago
An objects mechanical energy never changes it simply changes between
tatiyna
Actually moving and not. It is the sum of potential and kinetic energy.
4 0
3 years ago
State which of the three materials would allow the thermometer to measure the
nignag [31]

Answer:

i dont know

Explanation:im sorry to do this to you but you dont have to watch ads if you answer questions

6 0
2 years ago
During a circus performance, a 72-kg humancannonball is shot out of an 18-m-long cannon. If thehuman cannonball spends 0.95 s in
andreyandreev [35.5K]

Answer:

2872.8 N

Explanation:

We have the following information

m =n72kg

Δy = 18m

t = 0.95s.

From here we use the equation

Δy=1/2at2 in order to solve for the acceleration.

So a

=( 2x 18m)/(0.95s²)

= 36/0.9025

= 39.9m/s2.

From there we use the equation

F = ma

F=(72kg) x (39.9)

= 2872.8N.

2872.8N is the average net force exerted on him in the barrel of the cannon.

Thank you!

7 0
3 years ago
A spring is hanging from the ceiling. When a 250 gram of mass is attached to the free end, the spring elongates by 5 cm. The spr
lord [1]

Answer:

k = 49 N/m

Explanation:

Given that,

Mass, m = 250 g = 0.25 kg

When the mass is attached to the end of the spring, it elongates 5 cm or 0.05 m. We need to find the spring constant. Let it is k.

The force due to mass is balanced by its weight as follows :

mg=kx

k=\dfrac{mg}{x}\\\\k=\dfrac{0.25\times 9.8}{0.05}\\\\k=49\ N/m

So, the spring constant of the spring is 49 N/m.

8 0
3 years ago
Other questions:
  • The diagram shows changing wavelengths along the electromagnetic spectrum. Which labels belong in the areas marked Y and Z? Y: U
    10·1 answer
  • What will a spring scale read for the weight of a 58.0-kg woman in an elevator that moves (a) upward with constant speed 5.0 m/s
    12·2 answers
  • Jupiter’s strength of gravity is greater than Earth’s strength of gravity. A person’s will be the same on Jupiter and Earth. A p
    14·2 answers
  • Ship A is located 3.90 km north and 2.50 km east of ship B. Ship A has a velocity of 21.0 km/h toward the south and ship B has a
    8·1 answer
  • Ian throws a ball straight up into the air at a speed of 10 m/s. what is the ball's speed at the highest point?
    15·1 answer
  • Tarzan, whose mass is 94 kg, is hanging at rest from a tree limb. Then he lets go and falls to the ground. Just before he lets g
    15·1 answer
  • Một electron di chuyển theo đường tròn vuông góc với từ trường đều 1mT. Moment động lượng của electron đối với tâm vòng tròn là
    9·1 answer
  • The diagram shows two balls before they collide.
    9·2 answers
  • Which term does this explain?
    14·1 answer
  • Help thank you. will mark as brainliest if correct and no link to some unknown websites
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!