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**1. The problem statement, all variables and given/known data**

A projectile is shot upward from the top of a cliff in an angle of 25 with a velocity of 195 m/s.The height of the cliff is 315m. What will be its speed when it strikes the ground below? (Use conservation of energy)

**2. Relevant equations**

Ok...initial energy = final energy

Initial energy = .5m*(initial velocity square) + mgy

Final energy = .5m*(final velocity square)

initial velocity = sin*theta*upward initial velocity = sin25*195

**3. The attempt at a solution**

So I set them to equal and I got final V to be 114, but it says I had it wrong, canceling out the mass.... I have no clue what I did wrong there...