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
ratelena [41]
3 years ago
5

A person pushes horizontally with a force of 180. N on a 67.0 kg crate to move it across a level floor. The coefficient of kinet

ic friction is 0.14. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?
Physics
1 answer:
brilliants [131]3 years ago
8 0

Answer:

a) frictional force  = 93.8 N

b) acceleration = 1.29 ms∧-2

Explanation:

The frictional force can be calculated by :

μ k   = Fk / N

where:

  • μ k = coefficient of kinetic friction = 0.14
  • N= normal force or the force perpendicular to the contacting surface
  • Weight of the crate, W = mg = (67 × 10) == 670 N

take acceleration due to gravity = 10m/s∧2

The normal force , N = W = 670N ( upward force equals downward force)

Fk = μ k × N

= 0.14 × 670

Fk  = 93.8 N

b) To calculate the magnitude of crate's acceleration

F - Fk  = ma

where

  • Fk  = frictional force = 93.8N
  • F = horizontal force = 180 N
  • m = mass = 67.0 kg
  • a = magnitude of acceleration (unknown)

by substituting,

180 - 93.8 = 67a

86.2 = 67a

acceleration, a = (86.2 ÷ 67)

a = 1.29 ms∧-2

You might be interested in
When an atom that has no charge looses two electrons it becomes a
alex41 [277]

Answer: it becomes a positive ion

Explanation:

So, when an atom loses 2 electrons there will be no change in the number of neutrons. Therefore, an isotope will not form. Thus, it is concluded that when an atom with no charge loses two electrons, it becomes a positive ion.

8 0
3 years ago
Read 2 more answers
Melanye and Kaitlynn were traveling on a train for 6 hours. Over that time the train was at an average velocity of 70km/hr west.
slega [8]
The way he got the wrong guy to get back into the car he was just saying that I didn’t need it for me so he said no I’m gonna do tell you I have a little girl that was going on a little bit of a girl and I
8 0
3 years ago
A car drives 215 km east and then 45 km north. What is the magnitude of the car’s displacement? Round your answer to the nearest
34kurt

Displacement = (straight-line distance between the start point and end point) .

Since the road east is perpendicular to the road north,
the car drove two legs of a right triangle, and the magnitude
of its final displacement is the hypotenuse of the triangle.

    Length of the hypotenuse = √ (215² + 45²)

                                              =  √ (46,225 + 2,025)

                                              =   √ 48,250

                                              =       219.7 miles .

8 0
3 years ago
Read 2 more answers
The total distance traveled divided by the time it takes to travel the distance is
Westkost [7]

"The total distance traveled divided by the time it takes to travel the distance"

That's actually a pretty good definition of average speed. <em>(A)</em>

5 0
4 years ago
Describe how substance move from one state to another
Mekhanik [1.2K]
The temperature rises until the water reaches the next change of state — boiling. As the particles move faster and faster, they begin to break the attractive forces between each otherand move freely as steam — a gas. The process by which a substance moves from the liquid state to the gaseousstate is called boiling.
4 0
4 years ago
Read 2 more answers
Other questions:
  • A rectangular coil of dimensions 5.40cm x 8.50cm consists of25 turns of wire. The coil carries a current of 15.0 mA.
    5·1 answer
  • In 1610, galileo used his telescope to discover four prominent moons around jupiter. their mean orbital radii a and periods t ar
    15·1 answer
  • three eggs, each with a mass of ten grams are cooked to make scrambled eggs, what is the total mass of the scrambled eggs​
    5·1 answer
  • A dock worker pulls two boxes connected by a rope on a horizontal floor, as shown in the figure . All the ropes are horizontal,
    14·2 answers
  • How does the sum of forces help you
    8·2 answers
  • Which of the following is a negatively charged particle that is found in "clouds" around the nucleus?
    9·1 answer
  • What is hotter 6000k or 3000k
    15·2 answers
  • Your car gets a flat! You go from 90 kilometers per hour to a stop in 6 seconds. What is your rate of deceleration? (it's negati
    11·1 answer
  • A car with a mass of 650kg is moving with a speed of 22m/s calculate the kinetic energy of the car.
    5·1 answer
  • Please help
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!