RRB ALP practice question
A wooden block of mass 50 kg is placed on a smooth horizontal surface. A constant horizontal force of 'X' N is applied on it while it is at rest. The block acquires a velocity of 10 m/s in 2 s. What is the value of X?
From a RRB ALP Science practice set · Science
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Correct answer: (D) 250 N
Acceleration a = (v - u)/t = (10 - 0)/2 = 5 m/s2. Using F = ma, X = 50 x 5 = 250 N.
हिंदी में प्रश्न
50 kg द्रव्यमान का एक लकड़ी का गुटका एक चिकनी क्षैतिज सतह पर रखा जाता है। जब वह विरामावस्था में होता है तो उस पर'X' N का एक नियत क्षैतिज बल लगाया जाता है। गुटका 2 s में 10 m/s का वेग प्राप्त कर लेता है। X का मान क्या है?
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सही उत्तर: (D) 250 N
त्वरण a = (v - u)/t = (10 - 0)/2 = 5 मी/से^2। F = ma का प्रयोग करने पर, X = 50 x 5 = 250 N।
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