1) A car starts from rest and travels for 10 seconds with a constant acceleration of 3 m/s2. The driver then applies the brakes, causing a constant negative acceleration of – 4m/s?. Assuming the brakes are applied for 2 seconds.

A) How fast is the car going at the end of the braking?

B) How far has the car gone in these 12 seconds?

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?