1) A ball is kicked with an initial velocity of 12m/s at angle of 50° to the horizontal. How long will the ball stay in the air (assume it strikes the ground at the same height it was launched) a) 1.88 sec b) 1.54 sec c) 2.88 sec d) 1.71 sec 2) A cannon is fired horizontally from the top of a 30m cliff into the ocean. The initial velocity of the cannon was 1000m/s. How far from the cliff does the cannon ball hit the water? a) 2443 m b) 2376 m c) 3456 m d) 2470 m 3) A stone is thrown with an initial velocity of 15m/s at angle of 10° to the horizontal. How long will the stone stay in the air (assume it strikes the ground at the same height it was launched) a) 0.42 sec b) 0.94 sec c) 0.53 sec d) 0.12 sec

projectile motion

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