Question

EXAMPLE 2.2 Slowly Moving Train GOAL Obtain average and instantaneous velocities from a graph. x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s) (a) x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s) (b) PROBLEM A train moves slowly along a straight portion of track according to t versus time in the left hand figure. (a) Find the average velocity for the total average velocity during the first 4.00 s of motion. (c) Find the average velocit of motion. (d) Find the instantaneous velocity at t = 2.00 s (e) Find the ins = 9.00 s. STRATEGY The average velocities can be obtained by substituting the data into instantaneous velocity at t = 2.00 s is the same as the average velocity at that po vs. time graph is a straight line, indicating constant velocity. Finding the instantan 9.00 s requires sketching a line tangent to the curve at that point and finding its s SOLUTION

          EXAMPLE 2.2 Slowly Moving Train
GOAL Obtain average and instantaneous velocities from a graph.
x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s)
(a)
x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s)
(b)
PROBLEM A train moves slowly along a straight portion of track according to t versus time in the left hand figure. (a) Find the average velocity for the total average velocity during the first 4.00 s of motion. (c) Find the average velocit of motion. (d) Find the instantaneous velocity at t = 2.00 s (e) Find the ins = 9.00 s.
STRATEGY The average velocities can be obtained by substituting the data into instantaneous velocity at t = 2.00 s is the same as the average velocity at that po vs. time graph is a straight line, indicating constant velocity. Finding the instantan 9.00 s requires sketching a line tangent to the curve at that point and finding its s
SOLUTION

EXAMPLE 2.2 Slowly Moving Train
GOAL Obtain average and instantaneous velocities from a graph.
x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s)
(a)
x (m) 10 8 6 4 2 0 2 4 6 8 10 12 t (s)
(b)
PROBLEM A train moves slowly along a straight portion of track according to t versus time in the left hand figure. (a) Find the average velocity for the total average velocity during the first 4.00 s of motion. (c) Find the average velocit of motion. (d) Find the instantaneous velocity at t = 2.00 s (e) Find the ins = 9.00 s.
STRATEGY The average velocities can be obtained by substituting the data into instantaneous velocity at t = 2.00 s is the same as the average velocity at that po vs. time graph is a straight line, indicating constant velocity. Finding the instantan 9.00 s requires sketching a line tangent to the curve at that point and finding its s
SOLUTION

Added by Ismael H.

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