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
lidiya [134]
1 year ago
14

The box shown on the rough ramp above is sliding up the ramp.calculate the force of friction on the box

Physics
1 answer:
Anna [14]1 year ago
3 0

We are given a box that slides up a ramp. To determine the force of friction we will use the following relationship:

F_f=\mu N

Where.

\begin{gathered} N=\text{ normal force} \\ \mu=\text{ coefficient of friction} \end{gathered}

To determine the Normal force we will add the forces in the direction perpendicular to the ramp, we will call this direction the y-direction as shown in the following diagram:

In the diagram we have:

\begin{gathered} m=\text{ mass}_{} \\ g=\text{ acceleration of gravity} \\ mg=\text{ weight} \\ mg_y=y-\text{component of the weight. } \end{gathered}

Adding the forces in the y-direction we get:

\Sigma F_y=N-mg_y

Since there is no movement in the y-direction the sum of forces must be equal to zero:

N-mg_y=0

Now we solve for the normal force:

N=mg_y

To determine the y-component of the weight we will use the trigonometric function cosine:

\cos 40=\frac{mg_y}{mg}

Now we multiply both sides by "mg":

mg\cos 40=mg_y

Now we substitute this value in the expression for the normal force:

N=mg\cos 40

Now we substitute this in the expression for the friction force:

F_f=\mu mg\cos 40

Now we substitute the given values:

F_f=(0.2)(10\operatorname{kg})(9.8\frac{m}{s^2})\cos 40

Solving the operations:

F_f=15.01N

Therefore, the force of friction is 15.01 Newtons.

You might be interested in
A sophomore with nothing better to do adds heat to a mass 0.300 kg of ice at 0.0 âc until it is all melted.
kramer
Melting ice?  Man, that's cold
8 0
3 years ago
Hydraulic press is called an instrument for multiplication of force. Why?
Lisa [10]

Answer:

Hydraulic press is called an instrument for multiplication of force. Why? Because it uses Pascal's idea and  principle: F=p*S. If we apply small force to small piston you will generate a pressure. According to Pascal's law pressure is the same everywhere in closed system so the same pressure will act on large piston on the other side too.

Explanation:

4 0
3 years ago
rs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she use to produce the
anyanavicka [17]

Answer:

Mg and HCl

Explanation:

Here, we want to get the combination that could be used in the production of the needed hydrogen

An important chemical property of inorganic acids is that when they react with metals, they give off hydrogen gas in conjunction with the formation of a salt

HCl is a mineral acid while Mg is a metallic substance

So the reaction between this metal and the mineral acids will give the needed hydrogen gas to be produced

4 0
2 years ago
Read 2 more answers
Which device conferts electric energy into mechanical energy
Phantasy [73]

An electric motor converts electrical energy into mechanical energy.

What is electric motor?

An electric motor is an electrical machine that converts electrical energy into mechanical energy.

A generator is  mechanically identical to an electric motor, but operates with a reversed flow of power

Hence  it will convert mechanical energy into electrical energy.

Some applications of electric motor are:

Industrial fans, blowers and pumps, machine tools, household appliances, power tools, vehicles, and disk drives.

Learn more about electric motor :brainly.com/question/15409160

#SPJ1

4 0
2 years ago
Does it take 18 months for twins to be born, and 27 months for triplets, and so on?
Nezavi [6.7K]
No it all takes 9 or 10 months
3 0
3 years ago
Other questions:
  • How can astronomers infer wich elements are found in a star
    7·2 answers
  • What is the net force acting on a 0.15 kg hockey pick accelerating at a rate of 12 m/s
    10·1 answer
  • What is the velocity of a wave with a frequency of 6 Hz and a wavelength of 2 m?
    15·1 answer
  • A 5.0 c charge is 10 m from a small test charge. what is the magnitude of the electric field at the location of the test charge
    11·1 answer
  • The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
    10·1 answer
  • A force pair is produced when a tennis racket strikes a tennis ball. Which of the following best explains why the tennis ball do
    8·1 answer
  • A 2 cm tall object is placed 30cm in front of a concave mirror with focal length of 25 cm. What is the height of the image?
    7·1 answer
  • The school bag of four students A,B,C,D measures 9kg, 2800gm, 2kg and 8000gm respectively. Whose bag is the lightest
    10·1 answer
  • A train moves 80 km/hr and travels for 3.5 hr. How far did it go?
    8·1 answer
  • True or False—An external force is defined as a force generated outside the system of interest that acts on an object inside the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!