1. A long-distance runner has an average speed of 5 m/s during a race. How far does the runner travel in 19 min?

2. As a baseball Is being thrown, it goes from 0.0 to 40.0 m/s in 0.34 s.
(a) What is the acceleration of the baseball?
(b) What is the acceleration in g's?

3. A child sits on the edge of a spinning merry-go-round that has a radius of 2.1 m. The child's speed is 5 m/s. What is the child's acceleration?

4. During a NASCAR race a car goes 58 m/s around a curved section of track that has a radius of 240 m. What is the car's acceleration?

5. Initially stationary (the train starts at rest), a train has a constant acceleration of 0,9 m/s².
(a) What is Its speed after 38 s?
(b) What would be the total time it would take to reach a speed of 52 m/s?

6. A rock is dropped off the side of a bridge and hits the water below 2.7 S later.
(a) What was the rock's velocity when It hit the water?
speed
direction
(b) What was the rock's average velocity as it fell?
speed
direction
(c) What is the height of the bridge above the water?

7. During takeoff, an alrplane goes from 0 to 88 m/s In 9 s.
(a) What is its acceleration?
(b) How fast Is it going after 4 s?
(c) How far has it traveled by the time it reaches 88 m/s?

8. A high-performance sports car can go from 0 to 100 mph in 5.6 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 26 m/s in 5.5 s. What is its average acceleration?

9. A passenger jet flies from one alrport to another 1,353 miles away in 2.2 h. Find its average speed in the mks system of units.

10. What are the "basic" or "fundamental" physical quantities? (Select all that apply.) area
mass
speed
distance
time.
Why are they called that?

11. List the physical quantities identified in this chapter. From which of the fundamental physical quantities Is each derived? Which of them are vectors, and which are scalars?

12. What is the distinction between speed and velocity? Describe a situation in which an object's speed is constant but Its velocity is not.

13. What does the slope of a distance-versus-time graph represent physically? acceleration
area
velocity
displacement
time

1. A long-distance runner has an average speed of 5 m/s during a ra...