While John is traveling along a straightinterstate highway, he notices that the

Question

While John is traveling along a straightinterstate highway, he notices that the mile marker reads 256km.John travels until he reaches the 140 km marker and then retraceshis path to the 162 km marker.
What is John's resultant displacement from the 256km marker? Answerin units of km

and

A tennis ball with a speed of 25.6 m/s is moving perpendicular towall. After striking the wall the ball rebounds in the oppositedirection with a speed of 18.56 m/s. If the ball is in contact withthe wall for .0125s, what is the average acceleration of the ballwhile it is in contact with the wall? Take "toward the wall" to bethe positive direction. Answer in units of m/s^2. While John is traveling along a straightinterstate highway, he notices that the mile marker reads 256km.John travels until he reaches the 140 km marker and then retraceshis path to the 162 km marker.
What is John's resultant displacement from the 256km marker? Answerin units of km

and

A tennis ball with a speed of 25.6 m/s is moving perpendicular towall. After striking the wall the ball rebounds in the oppositedirection with a speed of 18.56 m/s. If the ball is in contact withthe wall for .0125s, what is the average acceleration of the ballwhile it is in contact with the wall? Take "toward the wall" to bethe positive direction. Answer in units of m/s^2.

Explanation / Answer

Displacement is just the distance between your initialposition and final position. 256km - 162km = 94km For the second one a = v/t = -18.56m/s - 25.6m/s/0.0125s =-3532.8m/s2 Hope that helps Hope that helps

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