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
madreJ [45]
3 years ago
11

A bicycle pedal is pushed straight downwards by a foot with a 33 Newton force. The shaft of the pedal is 20 cm long. If the shaf

t is π/5π/5 radians past horizontal, what is the magnitude of the torque about the point where the shaft is attached to the bicycle?
Physics
1 answer:
katen-ka-za [31]3 years ago
7 0

Answer:

The magnitud of the torque doing by the foot at the point where the shaft is attached is 0.063 Nm

Explanation:

The torque is obtained by multiplying the longitude from the shaft attached point to force acting point by the force perpendicular component:

T = d * Fp

Notice that the perpindicular component is the total force magnitud times the sino of the angle respect the horizontal:

Fp = F*sin(a)

Replacing the values for the force and the angle:

Fp = 33N*sin(π/5)  = 33N * 0.011 = 0.363 N

Taking the distance in meters:

T = 0.2m * 0.363 N = 0.063 Nm

You might be interested in
What is specific latent heat mean in simple word?​
Nuetrik [128]

Answer:

Amount of energy required to change the 1kg of a substance without changing its temperature.

7 0
2 years ago
0. A 5-kg block of ice is at a temperature of -27 °C. How much heat must be added to the ice to produce 5 kg of liquid water wit
stellarik [79]

Answer:

Q = 2687130 J

Explanation:

m = mass of block of ice = 5 kg

T_{i} = Initial temperature of ice block = - 27 °C

T_{f} = final temperature of water = 35 °C

c_{i} = specific heat of ice = 2108 J/(Kg °C)

L = Latent heat of fusion of ice = 334000 J/kg

c_{w} = specific heat of water = 4186 J/(Kg °C)

Heat added is given as

Q = m c_{i}(0 - T_{i})+ mL + m c_{w}(T_{f} - 0)

Q = (5) (2108)(0 - (-27))+ (5)(334000) + (5) (4186)(35 - 0)

Q = 2687130 J

8 0
3 years ago
Three equal point charges, each with charge 2.00 μC , are placed at the vertices of an equilateral triangle whose sides are of l
oksano4ka [1.4K]

Answer:

Explanation:

Energy of system of charges

= k q₁q₂ / r₁₂ + k q₁q₃ / r₁₃ + k q₃q₂ / r₃₂

q₁ , q₂ and q₃ are charges and  r₁₂ , r₁₃ , r₃₂ are densities between them

9 x 10⁹ ( 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 )

= 9 x 10⁹  x 3 x 16 x 10⁻¹²

= 432 x 10⁻³

= .432 J .

4 0
3 years ago
rank the reservoirs of freshwater on earth by volume, with that containing the highest volume on top.
lukranit [14]

The freshwater reservoirs on earth are ranked by volume, with the one with the biggest volume at the top is-

1. ice caps; 2. groundwater; 3. lakes; 4. rivers.

<h3>Explain the freshwater reservoirs on earth?</h3>

The atmosphere, the earth's surface, and the earth's interior are the three main locations where water can be kept.

  • Oceans, glacier ice, underground, lakes, soil humidity, living organisms, atmospheric atmosphere, and rivers are examples of these reservoirs, which are used to store water.
  • There is an estimated 1.386 billion km3 (330 million cubic miles) of water on Earth, of which 97.5% is salt water and 2.5% is fresh water.
  • Only 0.3% of a fresh water is liquid at the surface.
  • More than 70% of freshwater is utilized for agriculture in the majority of the world's areas.
  • An estimated 50% increase in agricultural output and a 15% increase in water flows are needed by 2050 to feed a globe of 9 billion people.

Thus, the freshwater reservoirs on earth are ranked by volume, with the one with the biggest volume at the top is-

  • 1. ice caps
  • 2. groundwater
  • 3. lakes
  • 4. rivers

To know more about the freshwater reservoirs, here

brainly.com/question/1784660

#SPJ4

7 0
1 year ago
A small uniform disk and a small uniform sphere are released simultaneously at the top of a high inclined plane, and they roll d
Yuri [45]

Answer:

the sphere

Explanation:

From the given information,

A free flow body diagrammatic expression  for the small uniform disk and a small uniform sphere which are released simultaneously at the top of a high inclined plane  can be seen in the image attached below.

From the diagram;

The Normal force mgsinθ - Friction force F  = mass m × acceleration a

Meanwhile; the frictional force

F = \dfrac{I \alpha }{R}

where

\alpha = \dfrac{a}{R}  in a rolling motion

Then;

F = \dfrac{I a }{R^2}

∴

The Normal force mgsinθ - F  =  m ×  a     can be re-written as:

\mathtt{mg sin \ \theta- \dfrac{Ia}{R^2} = ma}

making a the subject of the formula, we have:

a = (\dfrac{mg \ sin \theta}{m + \dfrac{I}{R^2}})

Similarly;

I = mk²  in which k is the radius of gyration

∴

replacing I = mk² into the above equation , we have:

a = (\dfrac{mg \ sin \theta}{m + \dfrac{mk^2}{R^2}})

where;

the uniform disk \dfrac{k^2}{R^2 }= \dfrac{1}{2}  

the uniform  sphere \dfrac{k^2}{R^2 }= \dfrac{2}{5}

∴

a = \dfrac{2}{3} \ g sin \theta \ for \ the \ uniform \ disk

a = \dfrac{5}{7} \ g sin \theta \ for \ the \ uniform \ sphere

We can now see that the uniform sphere is greater than the disk as such the sphere will reach the bottom first.

4 0
3 years ago
Other questions:
  • A dropped ball accelerates as it falls. but a ball rolling on a horizontal surface has zero acceleration because _______.
    8·2 answers
  • Why are hot springs and geysers is found in areas of present or a past activity
    5·1 answer
  • A 6.00-kg crate slides down a ramp from rest. The ramp is 1.00 m in length and inclined 30.0° above the horizontal. The crate ex
    14·1 answer
  • The acceleration of gravity at the surface of Moon is 1.6 m/s2 . A 5.0 kg stone thrown upward on Moon reaches a height of 20 m.
    15·1 answer
  • 2. Two charges are attracted to each other with a force of eight units. If the charge of one of the two
    5·1 answer
  • The kinetic energy of a rocket is increased by a factor of eight after its engines are fired, whereas its total mass is reduced
    9·1 answer
  • A 60-kg uniform board 2.4 m long is supported by a pivot 80 cm from the left end and by a scale at the right end (see the Fig. b
    13·1 answer
  • If the gas in a thermally insulated container does work on the piston, what happens to the temeprature?
    12·1 answer
  • Pls answer quick &amp; an accurate answer will get brainliest
    15·1 answer
  • Is atom on the offficial repository of ubuntu ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!