The National Transportation Safety Board is testing the crashworthiness of a new car. The 2340-kg vehicle is driven at 12.6 km/h into an abutment. During impact, the center of mass of the car moves forward 64.0 cm; the abutment is compressed by 8.30 cm. Ignore friction between the car and the road. (a) Find the force, assumed constant, exerted by the abutment on the car. (b) By h

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?