2-21. The motor draws through the
cable with a horizontal force 
. The initial velocity of the block is 
. If 
and 
are independent, determine
the speed of the 30 kg block when 
.
Solution:
Therefore, 
. Ans.
2-21. The motor draws through the
cable with a horizontal force . The initial velocity of the block is . If and are independent, determine
the speed of the 30 kg block when .
Solution:
Therefore, . Ans.