Gravitational acceleration on the moon is one sixth of that on earth. a ball released from rest above the surface falls from height d in a time of t = 1.1 seconds. a) write an expression for the final velocity vf of the ball when it impacts the surface of the moon assuming it is dropped from rest. this expression should be in terms of only, g (gravitational acceleration on earth) and time, tb) calculate the final velocity, vf, numerically in m/sc) calculate the height, d (in meters) from which the ball was droppedd) from how high up would this ball need to be dropped on the earth, de (in meters), if it took the same time to reach the ground as it did on the moon?

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. 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. a) what is the block's initial mechanical energy? 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.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds