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Hey guys my physics homework is due on 9/12 and I need help on these two problems.
1. How long is Tina, a ballerina, in the air when she leaps straight up with a speed of 1.8m/s
2. A Christmas tree ball will break if dropped on a hardwood floor with a speed of 2.0 m/s or more. Holly is decorating her Christmas tree when her cat Trickor, taps a ball, causing it to fall 15 cm from a tree branch to the floor. Does the ball break?
I know that there has to be an easy formula for this but I can't find it. If you can tell me the process by which you get the answer I would be very grateful.