The expression for the kinetic energy is mass times velocity squared over two
For the first question that gives us 2,25 joules
If the ball is at the given height then it has a further 60 Joules in potential energy.
Answer is D
-30 because -30 +20=-10
Hope this helped
Answer:
(-4x4+6x2+3)-(5x2-3)
ok.
-4x4+6x2=2x6
2x6 3
-(+5x2) -(-3)
_____ _____
-3x4 + 6
i think, im not sure but i think its -3x4+6. i might be wrong
