A 2.2 kg steel block is at rest on a steeltable. A horizontal string pulls on th

Question

A 2.2 kg steel block is at rest on a steeltable. A horizontal string pulls on the block.

(a) What is the minimum string tension neededto move the block?
1______N
(b) If the string tension is 21 N, what isthe block's speed after moving 1.0 m?
2______ m/s
(c) If the string tension is 21 N and thetable is coated with oil, what is the block's speed after moving1.0 m?
3______ m/s

Please indicate which answers are a,b,c
(a) What is the minimum string tension neededto move the block?
1______N
(b) If the string tension is 21 N, what isthe block's speed after moving 1.0 m?
2______ m/s
(c) If the string tension is 21 N and thetable is coated with oil, what is the block's speed after moving1.0 m?
3______ m/s

Please indicate which answers are a,b,c

Explanation / Answer

Given : Mass of the block ( m ) = 2.2 kg g = 9.8 m/s2 a ) Tension = m g                    = ( 2.2 kg ) ( 9.8 m/s2 )                    = 21.6 N b ) Tension ( T ) = 21 N     Distance ( d ) = 1.0 m      T = F F = m a a = T / m      = 21 N / 2.2 kg       = 9.54 m/s2 From v2 - u2 = 2 a s    where u = 0     v = 2 a s        = 2 (9.54 ) ( 1m)          = 4.4m/s I hope it helps you From v2 - u2 = 2 a s    where u = 0     v = 2 a s        = 2 (9.54 ) ( 1m)          = 4.4m/s I hope it helps you

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