Kinesiology Problem set 3

 

1)A small plane travels from Austin to San Antonio (80 miles) with a velocity of 55 mi/hr. How long does this trip take? 1.45 hr

 

2)A bicyclist cycles from Rohnert Park to the Sonoma/ Marin county line (15 miles) with a velocity of 30 mi/hr. How long does the trip take? .5 hours

 

3) A runner runs around a lake (60 meters in circumference) at a rate of 4 meters/sec. How long does the trip take? 15 sec

 

4) How much average acceleration is necessary to slow a luge racer down from 55 mi/hr to 35 mi/hr in 20 sec? –3600 mi/hr 2

 

5) How much average acceleration is necessary to slow down a baseball from 60 to 30 mi/hr in 15 sec? –7200 mi/hr 2

 

6) How much average acceleration is necessary to slow down a bicyclist from 30 to 20 kilometers/sec in 40 sec? .25 km/s2

 

7) How much average acceleration is necessary for a speed boat to reach 60 mi/hr from a standing start in one minute? 3600 mi/hr2

 

8) How much average acceleration is necessary for a horse to reach a gallop 20 mi/hr from a trot 5 mi/hr is 5 sec? 10, 869 mi/hr2

 

9) How much average acceleration is necessary for a swimmer to reach 2 meters/sec from 3 meters/sec in 20 sec? .05 m/s2

 

10) A baseball is dropped from an airplane from height of 555 ft. How long will it take for the baseball to reach the ground? 5.87 sec

 

11) A crazy diver dives from a bridge (100 meters). How long will he take to reach the ground? 4.32  sec

 

12) How long does it take for a penny dropped from the statue of liberty (200 meters) to reach the ground? 6.38 sec

 

13) If a ball is dropped from a height of 100 ft, how fast is it going when it hits the ground? 80.24 ft/sec

 

14) If an apple is dropped from an airplane (40,000 ft), how fast is it going when it hits the ground? 1604.99 ft/sec downward

 

15) If a pencil drops to the ground from a height of 2 meters how fast is it going when it hits the ground? 6.26 m/sec