solve question 3 a, b, c and d with details In the blank preceding each of the s

Question

solve question 3 a, b, c and d with details

In the blank preceding each of the six physical quantities listed below, write the letter "S" if it is a scalar and "V if it is a vector (i)____Displacement (ii)___Acceleration (iii)____Speed ____ (iv) Temperature____ Distance (iv)____Velocity A velocity vs. time graph is shown below for a person walking along a straight line for seven seconds. The person is located at x = -2.0m when t = 0s. In the boxes of the table, specify the sign of the position velocity and acceleration for each of the five periods: (0s

Explanation / Answer

1.  
   i. Displacement : Vector [V]
   ii. Acceleration : Vector [V]
   iii. Speed : Scalar [S]
   iv.Temperature : Scalar [S]
   v. Distance : Scalar [S]
   vi. Velocity : Vector [V]
2.
   from the graph
   slope of the graph acceleration
   area under the graph position
               position x       velocity v        acceleration a
   0 < t < 1       -               +               +
   1 < t < 2       -               +               0
   2 < t < 3       -               +               -
   3 < t < 4       -               -               -
   4 < t < 7       -               -               +

3. a. at t 4s
   v is- m/s

   b. x is xo +area under the curve
       x is -2 + 2 - 2 , x is -2 m

   c. at t 6s, acceleration is [-2-[-4]]/[7-4]
   a is 2/3 m/s/s

   d. at 6 s, position is -2+ 0.5*[6-4][-4-3]
   x is -9 m

   

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