A boy on the edge of a vertical cliff 20m high throws a stone horizontally outward with a speed of 12m/s. It strikes the ground at what horizontal distance from the foot of the cliff (in m). (Use g=10m/s?) O a. 10 O b. 20 O c. 24 O d. 36 O e. 15
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- A ball was thrown from a level ground at 300 m/s, 30° from the horizontal. How long will it take to hit back the ground? a. 32.58 sb. 35.58 sc. 39.58 sd. 30.58 sA boy 11.5 m above the ground in a tree house throws a ball for his dog, who is standing right below the reee house and starts running the instant the ball is thrown. The boy throws the ball horizontally at 8.50 m/a. A.) how fast must the dog run too catch the ball just as it reaches the ground? Express the answer in meters per second. (V= blank m/s) b.) how far from the tree will the dog catch the ball? (D= blank meters)A classic physics problem states that if a projectile is shot vertically up into the air with an initial velocity of 146 feet per second from an initial height of 89 feet off the ground, then the height of the projectile, h, in feet, t seconds after it's shot is given by the equation: h=−16t2+146t+89h=-16t2+146t+89 Find the two points in time when the object is 126 feet above the ground (to one decimal places). Answer: The object is 126 feet off the ground at the following times: (Enter your two answers separated by a comma. Round to ONE decimal places.)
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