Recent content by bkhofmann

Homework Statement A stick of length 0.8 m is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. Homework Equations w=sqrt(3g/2h) Should I use I=.5ML^2 or...

There were two but they are now "perfecly inelastically together. (is there is such a term) and I know the velocity of that new mass. Kinetic Energy is conserved?

Momentum is conserved since there is no friction, the blocks would fly off at the same speed.

Homework Statement I know the mass of the block and it's velocity when it contacts the spring and the spring conststant. It is on a horizontal frictionless surface. Homework Equations The Attempt at a Solution I know there is an equation to find the but I just cannot find it in my...

So just divide the Impulse by the mass?

Ok, having a real brain fart. What do I need to do with the impulse to get the new velocity?

Homework Statement The Figure shows an approximate representation of the contact force versus time during the collision of a 66-g tennis ball with a wall. The initial velocity of the ball is 4.375E+1 m/s perpendicular to the wall. What is the speed of the tennis ball after the collision...

the center of mass is at 87.26cm from the end of the stick and lon-capa accepted it.

I got it (46.5x2.9+98x11)/(2.9+11), the stone is just added on.

Ok the stone weighs 1.1kg/cm and the stick is 1.1 kg/35.279cm. Is this what you are talking about?

I believe that's what I have done. Do you come up with 58.9 cm?

Homework Statement A club-axe consists of a symmetrical 11.0 kg stone attached to the end of a uniform 2.9 kg stick, as shown in the figure. The length of the handle is L1 = 93.0 cm and the length of the stone is L2 = 10.0 cm. How far is the center of mass from the handle end of the...

1j=1nm

The force of friction and mg and the pulling force.

Homework Statement A 1864 g mass is on a horizontal surface with mk = 0.380, and is in contact with a massless spring with a force constant of 631 N/m which is compressed. When the spring is released, it does 3.15 J of work on the mass while returning to its equilibrium position. Calculate the...