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A body initially at rest moves with a constant acceleration of 30 m/s2. At about 20 seconds from the initial point, it would have travelled how much distance?
  • a)
    3 km
  • b)
    6 km
  • c)
    3.75 km
  • d)
    5.2 km
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A body initially at rest moves with a constant acceleration of 30 m/s...
Using the distance-time equation for a body moving with constant acceleration, S = ut +1/2at2 where, S = distance travelled, u= initial velocity, a=acceleration, t= time taken for the body to travel distance s.
Since, the body was initially at rest, u= 0 m/s,
Hence, Putting the values in the equation, S = ut +1/2*at2
S = 0 + ½ (30 x 202)
Or, S = 6000 metre or 6 km
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A body initially at rest moves with a constant acceleration of 30 m/s2. At about 20 seconds from the initial point, it would have travelled how much distance?a)3 kmb)6 kmc)3.75 kmd)5.2 kmCorrect answer is option 'B'. Can you explain this answer?
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