Concept explainers
A cannon elevated at 40° is fired at a wall 300 m away on level ground, as shown in Figure Q3.24. The initial speed of the cannonball is 89 m/s.
Figure Q3.24
a. How long does it take for the ball to hit the wall?
A. 1.3 s
B. 3.3 s
C. 4.4 s
D. 6 .8 s
E. 7.2 s
b. At what height h does the ball hit the wall?
A. 39m
B. 47m
C. 74m
D. 160m
E. 210m
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