Alab cart with a mass of 15 kg is moving with constant velocity, v, along a straight horizontal track. a student drops a 2 kg mass into it from directly above, and the cart continues moving. which equation best represents the horizontal momentum in this situation? 15vi  + 2vi  = 15vf  + 2vf 15vi  + 2(0)  = 15vf  + 2vf 15vi  + 2(0)  = (15  + 2)vf 15vi  + 2vi  =  (15  + 2)vf

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Rohit is trying to tune an instrument