A package of 4 mechanical pencils comes with 2 free erasers. If you get a total of 12 free erasers, how many packages of pencils
2 answers:
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Given :
Initial velocity , u = 15 m/s .
Final velocity , v = 30 m/s .
Distance travelled , d = 40 m .
Also , this body is uniformly accelerating .
To Find :
(a) What is the acceleration .
(b) How long does this take .
Solution :
Let , acceleration be a .
By , equation of motion :
Also , by equation :
Hence , this is the required solution .