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
Dahasolnce [82]
3 years ago
7

A force of F = (2.00ˆi + 3.00ˆj) N is applied to an object that is pivoted about a fixed axle aligned along the z coordinate axi

s. The force is applied at the point r = (4.00ˆi + 5.00ˆj) m.
Find:

(a) the magnitude of the net torque about the z axis

(b) the direction of the torque vector τ
Physics
1 answer:
Vladimir [108]3 years ago
5 0

Explanation:

It is given that,

Force applied to object, F=(2i+3j)\ N

Position, r=(4i+5j)\ m  

(b) The cross product of force and position vector is used to find the net torque about the z axis. It is given by :

\tau=F\times r

\tau=(2i+3j) \times (4i+5j)

\tau=\begin{pmatrix}0&0&-2\end{pmatrix}

or

\tau=(-2k)\ N-m

The torque is acting in -z axis.

(a) The magnitude of torque is given by :

|\tau|=\sqrt{(-2)^2}

|\tau|=2\ N-m

Hence, this is the required solution.

You might be interested in
Just about everyone at one time or another has been burned by hot water or steam. This problem compares the heat input to your s
kkurt [141]

Answer:

B. Steam burns the skin worse than hot water because the latent heat of vaporization is released as well.

Explanation:

It is given that both steam and the boiling water when in contact with the skin cools down from 100 to 34 degrees Celsius.

For any substance of mass m, the heat required to change the temperature by \Delta T is mC\Delta T (S.I. unit = Joules).

where C, the specific heat capacity is the same and a constant for both the condensed steam and the boiling water.  

But, there is a "hidden" energy (heat) released by the steam called latent heat

(given by mL, L = specific latent heat) which allows the phase transition (gas to liquid). While both of them are at the same temperature, their energy (heat) is different, which is why steam causes burns worse than boiling water

3 0
3 years ago
We tend to feel less _____ when more people are around to help out. compassionate conformity responsible no answer is correct
never [62]
Responsible  because we feel less stressed when others help out with our responsibilities. 
               
                 
5 0
3 years ago
Hey i am quite confused on this question, if someone could help me understand it i would really appreciate! :)
Alekssandra [29.7K]

You have to create table using cubic meters and the unit Kelvin to measure the temperature.

8 0
3 years ago
Read 2 more answers
Why are red stars cooler than blue stars?
asambeis [7]
OK both stars are burning and as they burn they emit electromagnetic radiation (light) and as we move in the light spectrum red comes before blue, so the star that looks red is cooler because as the temperature decreases the colour decreases
6 0
3 years ago
Read 2 more answers
A car accellerates from 12.0 m/s to 18 m/s in 4 seconds. What distance did it travel in this time?
Alona [7]

Answer:

Just go broom broom on ya teacher

Explanation:

cause why not

6 0
3 years ago
Other questions:
  • Suppose a star is 500 light- years away from earth is moved to be 600 light - years away. Which statement is correct?
    7·2 answers
  • A(n) _____ is an electric circuit that produces a magnetic field.
    10·2 answers
  • Maxwell shoots a rubber band at his friend Jimmy. Which type of energy is converted into kinetic energy?
    14·1 answer
  • A transformer has a secondary voltage of 140 volts and a secondary current of 3.5 amps. if the primary current is 10 amps, what
    13·1 answer
  • A boulder rolls off a 100 meter cliff with a horizontal velocity of 2 m/s.
    7·1 answer
  • Two protons are 1 × 10−10 m apart (about one atomic radius). Which interaction between two protons is stronger, the gravitationa
    15·1 answer
  • Find the magnitude of the force at point x = 15cm if k=10500 N/m when the work done by this force is WD= 1/2k x2
    6·1 answer
  • A 72-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.
    12·1 answer
  • What will terminal velocity look like on a velocity v. time graph?
    9·1 answer
  • What are the first three harmonics of a note produced on a 0.31 m long violin string if the waves on this string have a speed of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!