Reference no: EM138632

Q1. Points A and B have electric potentials of 243 V and 129 V, respectively. When an electron released from rest at point A arrives at point C its kinetic energy is KA. When the electron is released from rest at point B, however, its kinetic energy when it reaches point C is KB = 3KA.

Q2. In a head-on collision, a car stops in 0.12 from a speed of 30. The driver has the mass of 65, and is, fortunately, tightly strapped into his seat.

What force is applied to the driver by his seat belt during that fraction of a second?