4. On top of a 340.0 m high cliff you throw a rock downward the rock to hit the

Question

4. On top of a 340.0 m high cliff you throw a rock downward the rock to hit the bottom? B) At what velocity is the rock going when it hits? ibin A) How long does it take with an initial velocity of 12.0 m/s. continues on this course for 23.0 miles. Finally it heads due south for 19.0 miles. A) How far is its final position from the harbor? B) In what direction is its final position as viewed from the harbor? 5. A boat leaves the harbor heading 38 north of east and travels for 14.0 miles. It then head 17 south of east and 6. As car A approaches an intersection going East with a speed of 45.0 km/h with respect to the road, car B approaches the same intersection going North with a speed of 32.0 km/h with respect to the road. A) What is the velocity of car B with respect to car A? B) What is the direction of the velocity of car B with respect to car A?

Explanation / Answer

Ball is thrown vertically downwards

time of descent = u/g = 12/9.81 = 1.22 seconds

velocity when it hits the ground v=u+at=12+9.81*1.22 = 23.96 m/sec

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