1. A ball is projected vertically upward with a velocity of 15 m/s. After 0.5 seconds another ball is projected vertically upward with a velocity of 18 m/s. Can the second ball overtake the first ball? If so, determine the height and time during overtaking.
2. A rock is drop from rest from the top of an 80 m tower. How far from the ground is the rock 2.5 seconds after its release ? How long is the rock on air before hitting the ground? What is the height travelled during the third second?
3. Masses of 2 kg and 5 kg are drop from rest simultaneously from the top of a 30 m high building. Which mass will arrive on the ground first? How far from the ground are the rocks 1.5 seconds after they are release?
4. A rock is drop from rest from the top of an 80 m tower. Another rock was drop 0.75 second later with an initial speed of 10 m/s. Can the second rock overtake the first rock? If so, determine the time and the height relative to the ground when the overtaking take place.
5. A 50 g mass is projected upward with a velocity of 12 m/s. Determine the time when the mass is 4 m from the ground. What is the speed of the mass at this height?
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