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If a building is 100 m tall, how many seconds will it take for the ball to reach the ground?
h=100 m
g=9.8 m/s^2
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- An object is in motion when it undergoes a continuous change of ___. (2.1)KEY TERMS 1. physics (intro) 2. position (2.1) 3. motion 4. scalar (2.2) 5. vector 6. average speed 7. distance 8. instantaneous speed 9. average velocity 10. displacement 11. instantaneous velocity 12. acceleration (2.3) 13. average acceleration 14. acceleration due to gravity 15. free fall 16. terminal velocity 17. centripetal acceleration (2.4) 18. projectile motion (2.5) For each of the following items, fill in the number of the appropriate Key Term from the preceding list. r. _____ Displacement/travel timeKEY TERMS 1. physics (intro) 2. position (2.1) 3. motion 4. scalar (2.2) 5. vector 6. average speed 7. distance 8. instantaneous speed 9. average velocity 10. displacement 11. instantaneous velocity 12. acceleration (2.3) 13. average acceleration 14. acceleration due to gravity 15. free fall 16. terminal velocity 17. centripetal acceleration (2.4) 18. projectile motion (2.5) For each of the following items, fill in the number of the appropriate Key Term from the preceding list. b. _____ Difference between final and initial velocities divided by time
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- A ball dropped from the rooftop of a building takes 2.0 s to reach the ground. What is the height of the building? a. 39.2 m b. 9.8 m c. 19.6 m d. 1.9 mThe leaning tower of Pisa is 56 m tall. Supposedly Galileo investigated the behavior of falling objects by dropping them from the top of this tower and timing their descent. How long would it take an object to fall 56 m if air effects are negligible? a. 3.33 s b. 3.38 s c. 3.83 s d. 3.88 sOn a route between two towns a car moves 50km due east then 122 km S16°E then 40km due west. Determine using vector diagram the displacement of the car from the starting point to end point.
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