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Changes in Velocity (“Delta Vee”)

Problem 1: A ball is falling. At one moment, its speed is 3.0 m/s. One second later, its speed is 13.0 m/s.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.

Problem 2: A ball is rising. At one moment, its speed is 18.0 m/s. One second later, its speed is 8.0 m/s.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.

Problem 3: You roll a tennis ball at a wall of the school. The ball approaches the wall at 6 m/s, and then it bounces back to you at 5 m/s.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.


Problem 4: A soccer ball is rolling at 6.0 m/s to the right across a grassy field, slowing to a stop.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.

Problem 5: You get in an elevator at the ground floor of a tall building. At first, the elevator is at rest, but a few moments later, it is moving upward at 3.0 m/s.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.

Problem 6: You stand in the aisle of a train. The train is traveling at a constant velocity of 10. m/s, headed north.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.

Problem 7: A little kid sits still in a sled, not moving. You come along and give the kid a push. The kid and sled end up moving at 2.0 m/s to the left.

A.  Sketch the vectors vo, vf, and Dv during this time interval. / B.  Describe delta vee, stating both the magnitude and the direction.