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
White raven [17]
3 years ago
6

The length of a bicycle pedal arm is 0.152 m, and a downward force of 111 N is applied to the pedal by the rider.What is the mag

nitude of the torque about the pedal arm’s pivot when the arm is at angle (a) 30°, (b) 90°, and (c) 180° with the vertical?
Physics
1 answer:
Korvikt [17]3 years ago
5 0

Answer:

8.436 Nm

16.872 Nm

0

Explanation:

When we multiply the force with the distance at which the force is being applied we get torque

\tau=Frsin\theta

where

F = Force = 111 N

r = Distance = 0.152 m

\theta = Angle at which force is applied

When, \theta=30^{\circ}

\tau=111\times 0.152sin30\\\Rightarrow \tau=8.436\ Nm

The torque is 8.436 Nm

When, \theta=90^{\circ}

\tau=111\times 0.152sin90\\\Rightarrow \tau=16.872\ Nm

The torque is 16.872 Nm

When, \theta=180^{\circ}

\tau=111\times 0.152sin180\\\Rightarrow \tau=0\ Nm

The torque is 0

You might be interested in
Which of the following is not a reason why plants need water? *
solong [7]

Answer:

C

Explanation:

the plant cools itself down by allowing water to evaporate from their leaves so it doesn't need water to cool down

5 0
3 years ago
Two identical point charges are 3.00 cm apart. find the charge on each of them if the force or repulsion is 4.00 x 10^-7. (Use C
DanielleElmas [232]

Answer:

Charge on each is 2 x 10⁻¹⁰.

Explanation:

We know that Force between two point charges is given b the Coulomb's law as:

F = kq₁q₂/r^2

k = 9 x 10^9

r = 3.00 cm

= 0.03 m

q₁ = q₂

F = 4.00 x 10^-7

Rearranging the formula, we get:

F = k q²/r²

q² = Fr²/k

q² = 4 x 10⁻⁷ x 0.03²/(9x10⁹)

q² = 4 x 10⁻²⁰

q = 2 x 10⁻¹⁰

As there is force of repulsion between the charges, the charges must be both positive or both negative.

3 0
3 years ago
Stress distributed over an area is best described as: a) External force b) Axial force c) Radial force d) Internal resistive for
Anit [1.1K]

Answer:

Option D is the correct answer.

Explanation:

Stress is the force per unit area that tend to change the shape of body.

Stress is defined as internal resistive force per unit area.

         \texttt{Stress}=\frac{\texttt{Internal resistive force}}{\texttt{Area}}

         \sigma =\frac{F}{A}

So, so stress distributed over an area is best described as internal resistive force.

Option D is the correct answer.

8 0
3 years ago
The average speed of a greyhound bus from lansing to detroit is 104.5 km/h. on the return trip from detroit to lansing the avera
Nitella [24]
The average speed of the bus from Lansing to Detroit is 
v_1 = 104.5 km/h
while the average speed of the bus from Detroit to Lansing is
v_2 =56.2 km/h

The distance covered by the bus in the two trips is the same (the distance between the two cities), therefore, the average speed of the round trip can be calculated as the mean of the two speeds:
v= \frac{v_1+v_2}{2}= \frac{104.5+56.2}{2}=80.35 km/h
7 0
3 years ago
What force is required to accelerate a 385 kg couch at 0.2 m/s^2 ?
Juliette [100K]

Answer:

It takes 77 N

Explanation:

Using Newton's second law of motion, F=ma (Force equals mass times acceleration. Since the mass of the couch is 385 kg and the target acceleration is 0.2 m/s, you simply multiply mass times acceleration (ma) to get the total force, or 77 N.

6 0
3 years ago
Other questions:
  • PLEASE HELP An automobile with an initial speed of 5.80 m/s accelerates uniformly at the rate of 4.1 m/s^2 Find the final speed
    15·2 answers
  • In which direction does earth's magnetic field move?
    15·1 answer
  • Besides providing food and lumber, some trees are valuable natural resources because they contain substances that help make ____
    13·2 answers
  • A race car exerts 18,344 N while the car travels at an acceleration of 92.54 m/s2. What is the mass of the car? (Use the formula
    12·2 answers
  • Whích best explains parallel forces?
    9·1 answer
  • Which is a compound machine?
    12·2 answers
  • !! How much voltage is needed to generate a current of 20 Amps if a line has a resistance of 10 ohms ? How much power does the a
    9·1 answer
  • Which wave has a longer wavelength?
    6·1 answer
  • Open the resistance in a wire simulation, adjust only the length of the resistor, what happens to resistor?
    5·1 answer
  • "My distance to the center of the earth is about 4000 miles when I am on the surface. If I go to a height of 8000 miles above th
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!