Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which of the following is true about their kinetic energies as they reach the ground?
1.Bob's kinetic energy is greater than Esther's.
2.Esthers kinetic energy is greater than Bob's.
3.They have the same kinetic energy.
4.The answer depends on the shape of the slide.
Question 2Three identical balls are thrown from the top of a building, all with the same initial speed. The first ball is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal as in the figure below. Neglect air resistance, rank the speeds of the balls as they reach the ground, from fastest to slowest.
Genetic analysis begins with mutants 2
Jerry Uelsmann, Untitled (tree component).
What is the mass of 1.20 x 1024 molecules of sulfur dioxide, SO2?
A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ...
Phylogenetic tree constructed by comparing homologies in cytochrome c amino acid sequences
Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ...