- A person throws a ball
*upward *into the air with an initial velocity of 15.0 m/s. Calculate *(a) *how high it goes, and (*b*) how long the ball is in the air before it comes back to the hand. Ignore air resistance.
- Give examples to show the error in these two common misconceptions: (a) that acceleration and velocity are always in the same direction, and (b) that an object thrown upward has zero acceleration at the highest point
- Let us consider again the ball thrown upward of Example 2-16, and make more calculations. Calculate
*(a) *how much time it takes for the ball to reach the maximum height, and *( b ) *the velocity of the ball when it returns to the thrower’s hand. ( c) For the ball here, calculate at what time *t *the ball passes a point 8.00 m above the person’s hand.
- Suppose the same person is standing on the edge of a cliff, so that the ball can fall to the base of the cliff 50.0 m below.
*(a) *How long does it take the ball to reach the base of the cliff? *(b) *What is the total distance traveled by the ball? Ignore air resistance (likely to be significant, so our result is an approximation).

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Sophy David

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