Two trunks sit side by side on the floor. the large trunk (52kg) is to the left of the smaller trunk (34kg). a person pushes on the larger trunk horizontally toward the right. the coefficient of static friction between the trunks and the floor is 0.35.
a) determine the magnitude of the maximum force the person can exert without moving either trunk. *i got 290n.
b) calculate the force the larger trunk exerts on the smaller trunk.
update : c) would either answer change if the person pushed in the opposite direction on the smaller trunk. explain your reasoning.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.