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
vaieri [72.5K]
3 years ago
10

What is the velocity of the object at 20.0s

Physics
1 answer:
Korvikt [17]3 years ago
5 0
So notice that at the beginning of the motion, the object moves to 16m in a span of about 10 seconds. You should know that the velocity in a pvt graph is the slope, so here the v = 1.6 m/s more or less. At 20 seconds, the object doesn't seem to be moving and you see it stays still from 10-26ish seconds. From observing you can tell that there is no velocity, but the slope of this segment is zero so you can be sure of it. 
You might be interested in
What is the meaning of smooth?
damaskus [11]

A surface in which is flat or very soft to the touch and reduces splinters or anything sticking out, having an surface which does not have lumps, or indentations.

5 0
3 years ago
Find out the kinetic energy of a body of mass 2kg moving with the speed of 3m/s
Varvara68 [4.7K]
Kinetic energy = 1/2mv2

= 1/2 x 2 x 3^2
= 9J
7 0
3 years ago
A steel wire of length 31.0 m and a copper wire of length 17.0 m, both with 1.00-mm diameters, are connected end to end and stre
Brut [27]

Answer:

The time taken is  t =  0.356 \ s

Explanation:

From the question we are told that

  The length of steel the wire is  l_1  = 31.0 \ m

   The  length of the  copper wire is  l_2  = 17.0 \ m

    The  diameter of the wire is  d =  1.00 \ m  =  1.0 *10^{-3} \ m

     The  tension is  T  =  122 \ N

     

The time taken by the transverse wave to travel the length of the two wire is mathematically represented as

              t  =  t_s  +  t_c

Where  t_s is the time taken to transverse the steel wire which is mathematically represented as

         t_s  = l_1 *  [ \sqrt{ \frac{\rho * \pi *  d^2 }{ 4 *  T} } ]

here  \rho_s is the density of steel with a value  \rho_s  =  8920 \ kg/m^3

   So

      t_s  = 31 *  [ \sqrt{ \frac{8920 * 3.142*  (1*10^{-3})^2 }{ 4 *  122} } ]

      t_s  = 0.235 \ s

 And

        t_c is the time taken to transverse the copper wire which is mathematically represented as

      t_c  = l_2 *  [ \sqrt{ \frac{\rho_c * \pi *  d^2 }{ 4 *  T} } ]

here  \rho_c is the density of steel with a value  \rho_s  =  7860 \ kg/m^3

 So

      t_c  = 17 *  [ \sqrt{ \frac{7860 * 3.142*  (1*10^{-3})^2 }{ 4 *  122} } ]

      t_c  =0.121

So  

   t  = t_c  + t_s

    t =  0.121 + 0.235

    t =  0.356 \ s

4 0
3 years ago
What causes a star to shine brightly
steposvetlana [31]

what causes a star to shine brightly:

by squeezing atoms together in its core

5 0
3 years ago
Read 2 more answers
Which part(s) of the electromagnetic spectrum are visible to humans?
jarptica [38.1K]
Color aka the visible light spectrum
4 0
3 years ago
Other questions:
  • A neutral metal comb is held near an object with a negative charge. What happens to the comb?
    7·1 answer
  • 6. Willingness to take turns is one way we can express our attitudes in
    8·1 answer
  • The density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as meas
    14·1 answer
  • What is a translucent object?​
    8·2 answers
  • Find the mechanical advantage of a ramp that is 6.0 m long and 1.5 m tall.
    5·1 answer
  • A proton traveling due west in a region that contains only a magnetic field experiences a vertically upward force (away from the
    13·1 answer
  • A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does n
    12·1 answer
  • Part D- Isolating a Variable with a Coefficient In some cases, neither of the two equations in the system will contain a variabl
    5·1 answer
  • what will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.​
    11·1 answer
  • PLS I NEED TO TURN THIS IN SOON
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!