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.
Achondroplasia. The individual in this photograph has the reduced limb development that typifies thi
Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho
Phantom Limb Treatment
Atomic Number and Mass Number
A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ...
Greater Long-nosed Tree Shrew (Tupaia tana), Borneo and Sumatra.