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
Gnom [1K]
3 years ago
6

A museum curator moves artifacts into place on various different display surfaces. If the curator moves a 145 kg aluminum sculpt

ure across a horizontal steel platform with a force of 668N, what is the coefficient of kinetic friction?
Physics
2 answers:
NikAS [45]3 years ago
8 0
We are given the mass of an <span>aluminum sculpture which is 145 kg and a horizontal force equal to 668 Newtons. The coefficient of friction can be determined by dividing the horizontal force by the weight of the object. In this case, 668 N / 145 * 9.8 equal to coeff of friction of 0.47</span>
shepuryov [24]3 years ago
8 0

Answer:

\mu_k = 0.47

Explanation:

As we know that the mass of the curator is

M = 145 kg

now the Force of kinetic friction on the curator is given as

F_k = \mu_k F_n

now we know that the normal force on the curator is counter balanced by the weight of the curator

so we can say

F_n = mg

F_n = (145)(9.8)

F_n = 1421 N

Now from above formula we have

668 = \mu_k (1421)

\mu_k = \frac{668}{1421}

\mu_k = 0.47

You might be interested in
If you double the distance between you and the center of Earth, what happens to the strength of the gravitational field you expe
Lostsunrise [7]

Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

7 0
3 years ago
A 53-N force is needed to keep a 50.0-kg box sliding across a flat surface at a constant velocity. What is the coefficient of ki
earnstyle [38]

The weight of the box is (mass) x (gravity) = (50 kg) x (9.8m/s²) = 490 newtons.

If the box is sliding at constant speed, and not speeding up or slowing down,
that means that the horizontal forces on it add up to zero. 

Since you're pushing on it with 53N in <em><u>that</u></em> direction, friction must be pulling
on it with 53N in the <u><em>other</em></u> direction.

 The 53N of friction is (the weight) x (the coefficient of kinetic friction).

                                                  53N  =  (490N) x (coefficient).

Divide each side by  490N :  Coefficient = (53N) / (490N)  =  0.1082 .

Rounded to the nearest hundredth, that's    <em>0.11 </em>.      (choice 'd')


5 0
3 years ago
Read 2 more answers
a block of wood of density 0.8 gram per centimetre cube has a volume of 60 cm3 the mass of block will be...?​
Tamiku [17]
Density =mass/Volume

0.8=mass/60
Mass=0.8*60
Mass=48g
4 0
2 years ago
find the mass of a ball on a roof 30 meters high, if the ball's gravitational potential energy is 58.8 joules
Sidana [21]
We are given the gravitational potential energy and the height of the ball and is asked in the problem to determine the mass of the ball. the formula to be followed is PE = mgh where g is the gravitational acceleration equal to 9.81 m/s^2. substituting, 58.8 J = m*9.8 m/s^2 * 30 m; m = 0.2 kg.
3 0
2 years ago
Read 2 more answers
The graph in the accompanying figure (Figure 1) shows the magnitude of the force exerted by a given spring as a function of the
serious [3.7K]

The elastic potential energy stored in the stretched spring is 1 J.

<h3>What is Hooke's law?</h3>

Hooke's law states that; provided the elastic limit is not exceeded, the extension of the spring is directly proportional to the force on the spring.

Given that;

Force on the spring = 350 Newton

Distance stretched = 7 centimeters or 0.07 m

Hence;

F = ke

k = F/e = 350 Newton/0.07 m = 5000 N/m

Work done in stretching a spring = 1/2ke^2

= 0.5 × 5000 × (2 × 10^-2)^2 =1 J

Learn more about elastic potential energy: brainly.com/question/156316

4 0
2 years ago
Other questions:
  • When a bicycle coasts uphill, it moves slower and slower as it climbs. Why?
    14·2 answers
  • The velocity of a motor bike of mass 140 kg is increased to 40m/s from 20m/s in 2 seconds. Then the force required for this is?
    15·1 answer
  • A 4 kilogram box is at rest on a frictionless floor. A net force of 12 newtons acts on it. What is the acceleration of the box?
    5·1 answer
  • What disadvantage of convex mirror​
    11·2 answers
  • You are trying to find the amount of heat transferred between two substances. In order to do this, you plan
    5·1 answer
  • Whais the cause of necular bomb ​
    5·1 answer
  • Directions: Read the following excerpts carefully, then identify whether they employ informative, persuasive, or argumentative w
    11·1 answer
  • Your best friend weighs 81.5 kg and is a rugby player. In one of his games, he slides to a stop in a phenomenal manner. The coef
    10·1 answer
  • If a star collapses to a tenth its size, gravitation at its surface increases by?
    14·1 answer
  • What is the motional kinetic energy of a 25 kg object moving at a speed of 10 m/s?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!