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A woodchuck runs 25 m to the right in 7 s, then turns and runs 12 m to the left in 3 s. (Assume motion to the right is positive. Where applicable, indicate the direction with the sign of your answer. Enter your answers in m/s.)(a) What is the average velocity of the woodchuck? m/s(b) What Iis its average speed? m/s

Respuesta :

Answer: average velocity = - 0.37m/s, average speed = 3.785m/s

Explanation: when the woodchuck moved to the right, distance covered is 25m taking 7s to cover the distance

Speed = 25/7 =3.57m/s

Velocity = 3.57, due right (east)

When it moved to the left, distance covered is 12m and time is 3s

Speed = 12/3 = 4m/s.

Velocity = 4m/s due left (west).

a) the average velocity = 3.57 - 4 = - 0.37m/s.

This shows that the average velocity has a magnitude of 0.37m/s but in the negative direction (left). Since right represent the positive direction and left represent the negative direction.

b)

Average speed = (4 + 3.57)/2

Average speed = 7.57/2

Average speed = 3.785m/s.

This is because speed is a scalar and independent on direction.

The Answer is: average velocity = - 0.37m/s, average speed = 3.785m/s

  • when the woodchuck is moved to the right, also that distance covered is 25m taking 7s to cover the distance
  • Then the Speed = 25/7 =3.57m/s
  • Then the Velocity = 3.57, due right (east)
  • When it moved to the left, also that distance covered is 12m and time is 3s
  • Then Speed = 12/3 = 4m/s.
  • Then Velocity = 4m/s due left (west).

a. when the average velocity = 3.57 - 4 = - 0.37m/s.

  • Then This shows that the average velocity has a magnitude of 0.37m/s but in the negative direction (left).
  • also Since the right represents the positive direction and also the left represents the negative direction.

b. When Average speed = (4 + 3.57)/2

  • Then Average speed = 7.57/2
  • After that Average speed = 3.785m/s.
  • So, This is because speed is a scalar and also independent of direction.

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