Question
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19) Two boxes are connected to each other by a string as shown in the figure The 10-N box sides without friction on the horizontal table surlace. The pulley is ideal and the string, has segligible mass What is true about the tersion T in the string? A)T= 30 N B)T=20N C)Tc 30 N E)T 30N 20) A flatbed truck is carrying a 20.0-kg crate along a level rood. The coeficient of stalic friction 20 between the crate and the bed is 0.400, and the coefficient of kinetic friction is 0.300. What is the maximum acceleration that the truck can have if the crate is to stay in place relative to the truck? A) 8.00 m/s2 B) 78.5 m/s2 C)392 m/s2 D) 196 m/s2 E)7.84 m/s2
Explanation / Answer
Since box is slide without friction the tension must be less than 30N
that is c)T<30 is correct answer.
