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**Sorry I just noticed I posted this is the wrong forum, I don't see any delete button could a moderator move this to coursework/homework forum?

This is a problem that I kept getting wrong and never understood why. I'm not asking for answers just help on tackling the question. I have tried it before and I only got a. right. I am paraphrasing the question by the way.

11. There is a slingshot. It can be stretched 2.00 meters from its rest position with a force of 760N. They place a 6.50kg bowling ball in the sling and pull it down 2.90 meters from rest position. There is only vertical movement.

A)Find spring constant.

I got k=380N/m.

B)What is the total energy stored in the sling when the bowling ball is ready to be fired.

I tried Energy=0.5(k)(x)^2 where k is from A) and x is 2.90 meters. I got 1597.9 J

C)Total energy of bowling ball when it leaves the slingshot.

I tried Energy stored in spring. 1597.9 J

D)What is the kinetic energy when the ball leaves the sling?

I tried Energy stored in spring - potential energy used to gain 2.90 meters. 1413.17 J

F)Ignoring air Resistance what is maximum height.

I tried kinetic energy = potential energy (Solving for height in potential energy) ~22.184m + 2.9m from rest point.

This is a problem that I kept getting wrong and never understood why. I'm not asking for answers just help on tackling the question. I have tried it before and I only got a. right. I am paraphrasing the question by the way.

11. There is a slingshot. It can be stretched 2.00 meters from its rest position with a force of 760N. They place a 6.50kg bowling ball in the sling and pull it down 2.90 meters from rest position. There is only vertical movement.

A)Find spring constant.

I got k=380N/m.

B)What is the total energy stored in the sling when the bowling ball is ready to be fired.

I tried Energy=0.5(k)(x)^2 where k is from A) and x is 2.90 meters. I got 1597.9 J

C)Total energy of bowling ball when it leaves the slingshot.

I tried Energy stored in spring. 1597.9 J

D)What is the kinetic energy when the ball leaves the sling?

I tried Energy stored in spring - potential energy used to gain 2.90 meters. 1413.17 J

F)Ignoring air Resistance what is maximum height.

I tried kinetic energy = potential energy (Solving for height in potential energy) ~22.184m + 2.9m from rest point.

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