In which of the following is work being done?

a.
a traveler lifts a suitcase from the floor up to the baggage cart.

b.
an elevator carries people from the ground floor to the fifth floor.

c.
a woman tries hard to lift a barbell, but the barbell doesn’t move.

d.
a child drags her large teddy bear across the floor.

e.
a rocket ship rests on the moon.

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.