ConceptDevelopment 51 Practice Page（ConceptDevelopment 51页练习）.pdf

Name Class Date Concept-Development 5-1 Practice Page Projectile Motion . d e v r e s e r s t h g i r l l A . ) s ( e t a i l fi f a s t i r o , . c n I , n o i t a c u d E n 1. Above left: Use the scale 1 cm:5 m and draw the positions of the dropped ball at 1-second intervals. o 2 s r Neglect air drag and assume g = 10 m/s . Estimate the number of seconds the ball is in the air. a e P © 4 seconds 2. Above right: The four positions of the thrown ball with no gravity are at 1-second intervals. At 1 cm:5 m, carefully draw the positions of the ball with gravity. Neglect air drag and assume 2 g = 10 m/s . Connect your positions with a smooth curve to show the path of the ball. How is the motion in the vertical direction affected by motion in the horizontal direction? Vertical motion is affected only by gravity; horizontal motion does not affect vertical motion. CONCEPTUAL PHYSICS Chapter 5 Projectile Motion 19 .