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
Serjik [45]
2 years ago
12

a block of mass 5 kg is being pulled along a board horizontally with a constant velocity; the coefficient of friction between th

e two surface is 0.25, then what is the frictional forces that opposes the motion​
Physics
1 answer:
antoniya [11.8K]2 years ago
6 0

The block is in equilibrium, so the net forces parallel and perpendicular to the surface are

∑ F[para] = F[normal] - mg = 0

∑ F[perp] = F[pull] - F[friction] = 0

where mg is the weight of the block. It follows that

F[normal] = mg = (5 kg) (9.8 m/s²) = 49 N

and so the frictional force has magnitude

F[friction] = 0.25 F[normal] = 12.25 N ≈ 12 N

You might be interested in
PLZ EXPLAIN IM SO CONFUSED AND THIS IS DUE TONIGHT. I WILL GIVE 50 POINTS!
bezimeni [28]

When you first pull back on the pendulum, and when you pull it back really high the Potential Energy is high and the Kinetic Energy is low, But when up let go, and it gets right around the middle, that's when the Potential energy transfers to Kinetic, at that point the kinetic Energy is high and the potential Energy is low. But when it comes back up at the end. The same thing will happen, the Potential Energy is high, and the Kinetic Energy is low. Through all of that the Mechanical Energy stays the same. 

I hope this helps. :)

Brainliest?

8 0
3 years ago
How long does diphenhydramine hcl stay in your system?
drek231 [11]
A dose of Diphenhydramine hydrochloride, also known as Benadryl, would be active for about 4 to 6 hours in the body while it is excreted completely out the body within 1 day.It is soluble in water, odorless and a crystalline white powder. It is used as a cure for motion sickness and antihistamine.
4 0
3 years ago
The unit for measuring the rate at which light energy is radiated from a source is the
zzz [600]
The correct answer is letter D. candela. The unit for measuring the rate at which light energy is radiated from a source is the candela. L<span>umen is the unit for measuring the total amount of visible light emitted by a source. Lux is lumen per square meter. </span>
5 0
3 years ago
The Hubble Telescope The Hubble Telescope is a large telescope that orbits Earth. It was named after Edwin Hubble. Hubble was an
Marrrta [24]

Quoting from the article itself:

"Since it is above Earth's atmosphere, it gives us clearer pictures of space than telescopes on Earth can."

3 0
3 years ago
What does more damage; a slow semi truck, or a fast sports car
Goshia [24]
The fast sports car does more damage then the slow semi truck
7 0
3 years ago
Other questions:
  • The height of a typical playground slide is about 6 ft and it rises at an angle of 30 ∘ above the horizontal.
    7·1 answer
  • Which of the following statements are true about negative electric charges?
    11·2 answers
  • A student buys a 5000 Btu window air conditioner for his apartment bedroom. He monitors it for one hour on a hot day and determi
    12·1 answer
  • Put the following items in order of the scientific method:Draw conclusions. Ask a question. Develop a theory. Analyze data. Make
    11·1 answer
  • Focus groups are one of the most widely used ________ methods to gain greater understanding of a current problem or to develop p
    9·1 answer
  • If you are given three different capacitors, how many different combinations of capacitance can you produce, using all capacitor
    8·1 answer
  • Explain the relationship between the two reactions.
    10·1 answer
  • If a chemical spill reaches groundwater, the availability of which resource will be reduced for people in the area?
    6·1 answer
  • A boy lifted a 50 newton rock 1 meter. How much work was done?
    14·2 answers
  • A tennis player tosses a tennis ball straight up and then catches it after 1.77 s at the same height as the point of release.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!