Acrate is sitting in the center of a flatbed truck. as the truck accelerates to the east, the crate moves with it, not sliding on the bed of the truck. in what direction is the friction force exerted by the bed of the truck on the crate? 1. to the south 2. there is no friction force, because the crate isn’t sliding 3. to the west 4. to the east 5. to the north

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?