1. A 50 kg roller coaster car is launched, from ground level, at 20 m/s. How fast will it be moving when it reaches the top of a loop, which is 12 m above the ground? 2. A 200 g model rocket is observed to rise 100 m above the ground after launch. What must have been the launch speed of the rocket at the ground?

3. (This one’s a toughie) A 10 kg monkey swings on a vine from a point which is 40 m above the jungle floor to a point which is 15 m above the floor. If the monkey was moving at 2 m/s initially, what will be his speed at the 15 m point?

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