Recent content by Taidhg

I wasn't provided with a diagram however that is the same as the one I produced

Homework Statement A vertical retaining gate 2metres X 24metres hinged about the bottom edge of a dry dock has water to a depth of 21 metres on one side. Calculate the Retaining Force at the middle of the free upper edge of the gate to keep it shut in the vertical position. With the density of...

I stated in the original post that the object is in free fall. The question is about a pile driver falling onto a pile but I usually ignore those details.

I really don't know what information I need for the last part that's the issue. I know that the energy used in response to stop the objects will obviously be equal but I've never worked with retarding forces before.

I've calculated the velocity upon the objects impact which is 1.476 m/s2 I also have calculated the GPE before it falls which is 1962J and the kinetic energy upon impact which is 1961.33J I just don't see how I am meant to calculate this last question.

1. An object with a mass of 50kg is raised vertically 4 meters above an object of 6kg and then is allowed to fall freely onto the object into the ground. Both objects travel into the ground to a depth of 24cm without rebounding. Calculate the retarding force causing both objects to come to...

I see what I have done, I got the right answer at last. Thanks for the help :)

my calculations were 220725-½2250 = 219600squared root 219600 = 468.6 m/s2 I feel like I am doing something wrong.

So because GPE = 220725 v2 = 220725-1/2m?

Kinetic energy is 1/2 m v2 but I don't have velocity

PE = mgh and W = Fd

I have a question which asks me if an object with a mass of 2250kg starts from rest at the top of a frictionless ramp 10m long and is at an angle of 10 degrees horizontally, what is the velocity of the object the moment it reaches the bottom of the ramp? I have been trying to work out this...