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A truck initially at rest travels a distance of 70 m in 7 seconds and the motion continues in the same manner. If the body executes a uniformly accelerated motion, then acceleration (a) is (approx.)

  1. 0 m/s2
  2. 3 m/s2
  3. 5 m/s2
  4. 8 m/s2

Answer (Detailed Solution Below)

Option 2 : 3 m/s2
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Detailed Solution

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CONCEPT: 

  • The equations of motion are used to characterize the movement of the body and are given by

V = u + at

V2 = U2 + 2as

Where S = Displacement, t = time a =  acceleration, V = Final velocity, U = Initial velocity 

CALCULATION:

Given  S = 70 m, t = 7 sec u = 0m/s

  • The equation of motion connecting displacement, initial velocity, and time is given by

substituting the given values the above equation becomes 

  • Hence, option 2 is the answer

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