A child on roller skates pushes off against the wall with a force of 40N. How far must the child push themselves away from the wall (starting from rest), so that his final kinetic energy is 275J?

A bullet of mass m is fired at a block of mass M hanging from a string. The bullet embeds itself in the block. This is an inelastic collision, in contrast to an elastic collision where energy is conserved.

Ball a has half the mass and eight times the kinetic energy of ball b. what is the speed ratio va / vb?

Compare and contrast formation of with the formation of mgcl2

When the current through an electromagnet ceases, what generally happens to the magnetic field?

Two stones are thrown vertically upward from the ground, one with three times the initial speed of the other. Assume free fall. Part A If the faster stone takes 12.0 s to return to the ground, how long will it take the slower stone to return

Find velocity gradient

In equation y = mx means what

Sea anemones can produce completely new organisms by regeneration. Are these new organisms genetically identical to the parents? Why or why not

What are 3 types of muscle tissue still?

Which of the following is a true statement? * Waves do not transport matter through which they travel Waves can transport matter through solids, liquids and gases, but not through empty space.