Part A

The $240-kg$ crate rests on the ground for which the coefficients of static and kinetic friction are ${}_s=0\mathrm{.}5$ and ${}_k=0\mathrm{.}4,$ respectively. The winch delivers a horizontal towing force $T$ to its cable at A which varies as shown in the graph. Originally the tension in the cable is zero.

$($Figure $1)$

Figure

$1$ of $1$

$$

$$

Determine the speed of the crate when $t=4s.$ Hint: First determine the force needed to begin moving the crate.

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

View Avallable Hint$($s$)$

Previous Answers

X Incorrect; Try Agaln

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