Problem 13.38

The 300-kg bar B, originally at rest, is being towed over a series of small rollers. The motor M is drawing in the cable for a short time at a rate of v=(0.4t2) m/s, where t is in seconds (0≤t≤6 s). Neglect the mass of the cable, pulley, and the rollers

Part A

Determine the force in the cable when t = 3 s .

Express your answer to three significant figures and include the appropriate units.

T =

0.720 kN

Part B

How far does the bar move in 3 s ?

Express your answer to three significant figures and include the appropriate units.

s =

3.60 m