A  delivery truck with a flat bed drives around the city of San Francisco,  which is famous for its steep hills. The truck carries a crate on its  bed. Unwisely, the driver has not secured the crate to the bed, so the  crate merely rests on the bed of the truck. See Fig. 6.3.1.

Question 3

The  truck is now at rest on the incline at the stoplight. When the  stoplight changes to green, the truck speeds up from rest. What maximum  acceleration magnitude can the truck have if the crate is not to slip  relative to the bed of the truck?