# Module 1 - CH 1 HW (Homework).docx - 1 1 A long-distance...

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1. 1 A long-distance runner has an average speed of 3 m/s during a race. How far does the runner travel in 31 min?
2. As a baseball is being thrown, it goes from 0.0 to 40.0 m/s in
3. (a) What is the acceleration of the baseball?
(b) What is the acceleration in g 's?
4. A child sits on the edge of a spinning merry-go-round that has a radius of 1.6 m. The child's speed is m/s. What is the child's acceleration?
5. During a NASCAR race a car goes 86 m/s around a curved section of track that has a radius of m. What is the car's acceleration?
6. . 7.
(a) What is its speed after 18 s?
(b) What would be the total time it would take to reach a speed of 33 m/s?
A rock is dropped off the side of a bridge and hits the water below 7.3 s later. (a) What was the rock's velocity when it hit the water?
(b) What was the rock's average velocity as it fell?
(c) What is the height of the bridge above the water?
During takeoff, an airplane goes from 0 to 68 m/s in 13 s. (a) What is its acceleration?
(b) How fast is it going after s?
(c) How far has it traveled by the time it reaches 68 m/s?
A high-performance sports car can go from 0 to 100 mph in 9.0 s. (Assume the car travels in the positive direction. Indicate the direction with the sign of your answer.)
(a) What is the car's average acceleration (in SI units; meter-kilogram-second) ?
(b) The same car can come to a complete stop from 31 m/s in 5.7 s. What is its average acceleration?
-5.43 m/s2 A passenger jet flies from one airport to another