A block having mass 500 g slides on a rough horizontal table, if the friction coefficient between block and table is 0.2 and initial speed of the block is 60 cm/s. Then calculate:
(i) Work done by frictional force in bringing the block to rest.
(ii) How far does the block move before coming to rest. (g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
((i) –0.09 J (ii) 9 cm)
Sol. (i) W f = 
K = 0 – 
m u 2
= – 
(0.6) 2
= – 
× 
× 
J
= –0.09 J
(ii) – 0.09 = µ k mg × s
⇒ 
= 
× 
× 10 × s
s = 9 cm
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