ഒരു കാറിൽ പ്രയോഗിച്ച ബ്രേക്കുകൾ, കാറിനെ ചലനത്തിന്റെ  വിപരീത ദിശയിൽ 10m/s2 ത്വരിതപ്പെടുത്തുന്നു. ബ്രേക്കുകൾ പ്രയോഗിച്ചതിന് ശേഷം കാർ നിർത്താൻ 3 സെക്കന്റ് എടുക്കുന്നുവെങ്കിൽ, ഈ സമയത്ത് അത് സഞ്ചരിക്കുന്ന ദൂരം കണക്കാക്കുക.

  1. 45 m
  2. 55 m
  3. 35 m
  4. 65 m

Answer (Detailed Solution Below)

Option 1 : 45 m
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RRB Group D Full Test 1
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Detailed Solution

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നൽകിയിരിക്കുന്നത്,

a = –10 m/s2; t = 3 s, കൂടാതെ  v = 0 m/s.

v = u + at 

0 = u + (–10 m/s2) × 3s

u = 30 m/s

s = u t + 1/2 a t2

= 30 × 3 + 1/2 × -10 × 3 × 3

= 90 - 45

= 45 m

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