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
tamaranim1 [39]
4 years ago
13

Let's practice calculating the frictional force of a skier on old "woody" skis and wet snow. The skier has a mass of 58 kg. The

coefficient of kinetic friction of wood skis on wet snow is 0.1 Notice there are no units for the coefficient of friction. What is the kinetic frictional force between the wood skis and the snow
Physics
1 answer:
kicyunya [14]4 years ago
8 0

Answer:

Kinetic frictional force will be equal to 56.84 N

Explanation:

We have given mass of the skier m = 58 kg

Acceleration due to gravity g=9.8m/sec^2

Coefficient of kinetic friction \mu _k=0.1

We have to find the kinetic frictional force

Kinetic frictional force is given by

F_K=\mu _Kmg=0.1\times 58\times 9.8=56.84N

So kinetic frictional force will be equal to 56.84 N

You might be interested in
What explains the key difference between a bomb calorimeter and a coffee cup calorimeter?.
Virty [35]

The key difference between a bomb calorimeter and a coffee cup calorimeter is high temperature.

<h3>What is bomb calorimeter?</h3>

A bomb calorimeter is an apparatus that can measure heats of combustion, used in various applications such as calculating the calorific value of foods and fuels.

<h3>What is coffee cup calorimeter?</h3>

A coffee cup calorimeter is a cup used to provide insulation when materials are mixed inside of it.

<h3>Difference between the two calorimeter</h3>
  • The coffee cup calorimeter can't be used for high-temperature reactions, either, because they would melt the cup.
  • A bomb calorimeter is used to measure heat flows for gases and ​high-temperature reactions

Learn more about calorimeter here: brainly.com/question/1407669

#SPJ1

3 0
2 years ago
A 35-gram stainless steel ball on a track is moving at a velocity of 9 m/s. On the same track, a 75-gram stainless steel ball is
elena-s [515]

Answer:

4.2 m/s

Explanation:

Momentum is conserved.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

(35 g) (9 m/s) + (75 g) (-7 m/s) = (35 g) (-15 m/s) + (75 g) v

315 g m/s − 525 g m/s = -525 g m/s + (75 g) v

315 g m/s = (75 g) v

v = 4.2 m/s

5 0
4 years ago
Read 2 more answers
The gas tank is made from A-36 steel and has an inner diameter of 1.50 m. If the tank is designed to withstand a pressure of 5 M
Tanzania [10]

Answer:

a. t = 23mm, b. t = 20mm

Explanation:

Obtain the value of yield strength in tension for A- 36 steel from table ‘Average Mechanical Properties of typical Engineering Materials’, which is σ(y) = 250 MPa.

a.

Assume that the thin wall analysis is valid, Calculate the hoop stress

σ(1) = pd/2t, where p is the pressure in the tank, d is the internal diameter of the tank and t is the thickness.

Substitute 5MPa for p and 1.5m for d

σ(1) = 5 x 10⁶x 1.5/2t

σ(1) = (3.75 x 10⁶)/t

Calculate the longitudinal stress

σ(2) = pd/4t

σ(2) = (5 x 10⁶ x 1.5)/4t

Apply Maximum Shear stress theory which states that failure occurs when the maximum shear stress from a combination of principal stresses <u>equals or exceeds</u> the value obtained for the shear stress at yielding in the uni-axial tensile test. Hence

τ(abs.max) ≤ τ (allowed)

τ (abs.max) ≤ σy /2FS, where FS is the factor of safety

Substitute σ(1)/2 for τ (abs.max) as both the principal stresses have same sign.

σ(1)/2 ≤ σy/2FS

3.75 x 10⁶/2t = 250 x 10⁶/2 x 1.5

T = 0.0225m = 22.5mm = 23mm to the nearest millimeter

Hence the required minimum thickness using the maximum shear stress theory is t = 23mm

b.

Apply maximum distortion energy theorem

σ²(allowed) =σ²(1) – σ(1) x σ(2) + σ²(2)

σ²(y)(allowed)/FS = (3.75 x 10⁶/t)² – (3.75 x 10⁶/t) x (1.875 x 10⁶/t) + (1.875 x 106/t)²

250 x 10⁶/1.5 = (3.2476 x 10⁶)/t

t = 3.2476/166.67

t = 0.0195 m = 19.50 mm = 20mm to the nearest millimeter

Hence, the required minimum thickness using the maximum distortion energy theory is t = 20 mm

7 0
3 years ago
The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the disp
dem82 [27]

Answer:

Speed, v = 312.34 m/s

Explanation:

The equation that describes a transverse wave on the string is given by :

y=0.0120\ msin[(927\ rad/s)t-(3\ rad/m)x]..............(1)

Where

y = displacement of a string particle

x = position of the particle on the string

The wave is travelling in the +x direction. We have to find the speed of the wave.

The general equation of traverse wave is given by :

y=A\ sin(kx-\omega t)................(2)

On comparing equation (1) and (2) we get,

k = 3 rad/m

Since, k=\dfrac{2\pi}{\lambda}

\lambda=\dfrac{2\pi}{3} ..............(3)

Also, \omega=927\ rad/s

Since, \omega=2\pi \nu

\nu=\dfrac{927}{2\pi}...............(4)

Speed of the wave is the product of frequency and wavelength i.e.

v=\nu\times \lambda

Using equation (3) and (4), the speed of the wave can be calculated as :

v=\dfrac{927}{2\pi}\times \dfrac{2\pi}{3}

v = 312.34 m/s

Hence, the speed of the transverse wave is 312.34 m/s

5 0
3 years ago
A plastic rod and a piece of cloth are both uncharged. A student rubs the plastic rod with the cloth. The plastic rod becomes ne
Molodets [167]

Answer: a sock and a Pepe when the Pepe is rubbed by the sock the energy is enormous

Explanation:

7 0
3 years ago
Other questions:
  • It is not possible for just 3 forces to be acting upon an object and the forces are balanced
    5·1 answer
  • Using an example, explain how small atoms are.
    13·1 answer
  • A ball is thrown straight up. What can be said about the sign of work done by the force exerted by gravity while the ball moves
    10·1 answer
  • A paper airplane with mass 0.1 kg is flying 1.5 m above the ground with a speed of 2 m/s. what is the total mechanical energy of
    15·1 answer
  • The ventilation fan of the bathroom has a volumetric flow rate of 1,640 L/s. If the air density is 1.28 kg/m3, calculate the mas
    10·1 answer
  • An object starts from rest and accelerates uniformly in a straight line in the positive x direction. After 11 seconds, its speed
    11·1 answer
  • Find the work done lifting a 290-pound weight 28 feet in the air.
    6·2 answers
  • Two lamps rated 60W; 240V and 100W, 240Vrespectively are connected in series to a 240V power source. Calculate;
    13·1 answer
  • ‏A car speeds up from 20m/s to 40m/s. What happens to its kinetic<br> ‏energy?
    7·1 answer
  • A circuit with a 60 V battery, a 7 Ω resistor, a resistor with 0.2 A across it, and another 7 Ω resistor in series. What is the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!