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1. Physics Angle Problem

Homework Statement Some enterprising physics students working on a catapult decide to have a water balloon ﬁght in the school hallway. The ceiling is of height 3.3 m, and the balloons are launched at a velocity of 9.7 m/s. The acceleration of gravity is 9.8 m/s2 .At what angle must they...
2. Help With finding displacement in uniform acceleration

Homework Statement A subway train starting from rest leaves a station with a constant acceleration. At the end of 7.8 s, it is moving at 11.778 m/s. What is the train’s displacement in the ﬁrst 5.6394 s of motion? Answer in units of m Homework Equations a= velocity final - velocity...
3. Help With finding initial vertical speed

Homework Statement A Ball is thrown upwards. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s2 and maximum height is 7.2 m ,. Neglect air resistance. Homework Equations Vfinal squared = velocity initial squared + 2g times change in y The Attempt at a...