Question

14. (5 pts) A motorist drive East for 30 minutes at 50 mi/hr, then stops 1/2 hour for lunch. She continues East 120 miles in 2 hours. (a) What is her total displacement? (b) What is her average speed? 15. (2 pts) Can a car have a Northward velocity and a Southward acceleration. Explain. 16. (5 pts) A carpenter tosses a hammer vertically to a friend working on a roof 25 ft above him. A) Draw a diagram showing relevant information, including initial and final velocity. B) With what speed must he toss the hammer upward for the friend to easily catch it? C) If the friend does not catch the hammer, how long will it be in the air before returning to the original height from which it was released?

Answer 1