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
cricket20 [7]
3 years ago
6

Do you think that rubbing two pieces of woods together would have more or less friction than wood rubbing against smooth metal ?

why?
Physics
1 answer:
salantis [7]3 years ago
7 0

Answer: More friction

Explanation: The wood would probably splinter, causing even more friction, while the metal would probably smooth the wood out.

You might be interested in
You attach a 1.10 kg block to a horizontal spring that is fixed at one end. You pull the block until the spring is stretched by
dangina [55]

Answer:

6.3 m/s

Explanation:

m = mass of the block = 1.10 kg

k = spring constant of the spring

x = stretch in the spring = 0.2 m

t = time taken by block to come to zero speed first time = 0.100 s

T = Time period of oscillation

Time period of oscillation is given as

T = 2t

T = 2 (0.1)

T = 0.2 s

Time period is also given as

T = 2\pi \sqrt{\frac{m}{k}}

0.2 = 2(3.14) \sqrt{\frac{1.10}{k}}

k = 1084.6 N/m

v = maximum speed of the block

using conservation of energy

Maximum kinetic energy = Maximum spring potential energy

(0.5) m v² = (0.5) k x²

m v² = k x²

(1.10) v² = (1084.6) (0.2)²

v = 6.3 m/s

6 0
2 years ago
what is the kinetic energy of a 1 kilogram ball is thrown into the air with an initial velocity of 3 m/sec
s344n2d4d5 [400]
Data:
m (mass) = 1 Kg
s (speed) = 3 m/s
Kinetic energy = ? (Joule)


Formula (Kinetic energy)
E_{k} =  \frac{m*s^2}{2}

Solving:
E_{k} = \frac{m*s^2}{2}
E_{k} =  \frac{1*3^2}{2}
E_{k} =  \frac{1*9}{2}
E_{k} =  \frac{9}{2}
\boxed{\boxed{E_{k} = 4.5\:J}}\end{array}}\qquad\quad\checkmark
3 0
3 years ago
One difference between a hypothesis and a theory is that a hypothesis
DaniilM [7]

A hypothesis is a proposed explanation made on the basis of limited information while a theory is a series of ideas intended to explain something.

7 0
2 years ago
A spring with a force constant of 5.3 n/m has a relaxed length of 2.60 m. when a mass is attached to the end of the spring and a
olganol [36]
This is the equation for elastic potential energy, where U is potential energy, x is the displacement of the end of the spring, and k is the spring constant. 
<span> U = (1/2)kx^2 
</span><span> U = (1/2)(5.3)(3.62-2.60)^2 
</span> U = <span> <span>2.75706 </span></span>J
6 0
3 years ago
Difference between electrolytes and nonelectrolytes.
Trava [24]

Answer:

Electrolytes are salts or molecules that ionize completely in solution. As a result, electrolyte solutions readily conduct electricity. Nonelectrolytes do not dissociate into ions in solution; nonelectrolyte solutions do not, therefore, conduct electricity

Explanation:

8 0
1 year ago
Read 2 more answers
Other questions:
  • Light incident on a polarizer is then passed through a second polarizer. If the polarizer and the analyzer are perpendicular to
    9·2 answers
  • Sally is on a canoe that comes to a stop a small distance from the dock. Since it is such a small distance, Sally decides to jum
    13·1 answer
  • Some rearview mirrors produce images of cars to your rear that are smaller than they would be if the mirror were flat.Are the mi
    5·1 answer
  • A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling
    14·1 answer
  • PLEASE HELP RIGHT ANSWER WILL GET THE BRAINLY..
    11·2 answers
  • Newton would agree that all objects on Earth exert a
    15·1 answer
  • First right is brainliest, plz help:)
    12·1 answer
  • A ship's fathometer (an echo sounder) transmits a sound pulse and records the return of an echo 7.4 seconds later. If the speed
    11·1 answer
  • How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is
    6·1 answer
  • 21. Explain why a passenger who is not wearing a safety belt will likely hit the windshield in a head-on collision. please answe
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!