Chapter 3 Review Questions

What is the average speed of a horse that gallops a round-trip distance of 15 km in a time of 30 min?

(a) 0

(b) 0.5 km/h

(c) 30 km/h

(d) 500 m/s

(e) None of the above

What is the average velocity for the round-trip of the horse in the question above?

(a) 0

(b) 0.5 km/h

(c) 30 km/h

(d) 500 m/s

(e) None of the above

You throw a stone downward. It leaves your hand with a speed of 10 ft/s. What is its speed two seconds after leaving your hand? (Neglect air resistance.)

(a) 10 ft/s

(b) 32 ft/s

(c) 42 ft/s

(d) 64 ft/s

(e) 74 ft/s

An object dropped from rest in free fall will fall feet in the first second and feet in the second second.

(a) 16, 48

(b) 16, 32

(c) 32, 32

(d) 32, 64

(e) 32, 48