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Physics
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If a car at rest accelerates uniformly to a velocity of 144km/hr in 20sec. Find distance travelled by the car in 1st 20sec

answers: 1
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Answer:
Given:
  • Initial velocity = u= 0m/s
  • Final velocity = v = 144km/ hour
  • Time = t = 20sec

━━━━━━━━━━━━━━━━

Need to Find:
  • Distance travelled by car in 1st 20 sec=?

━━━━━━━━━━━━━━━━

Solution:

v= 144km/ hr

➟ v =

➟ v= 40m/s

━━━━━━━━━

We know, from 1st equation of motion that:

v = u + at

➟ a =

━━━━━━━━━

We know from 2nd equation of motion that:

━━━━━━━━━

Substitute the value of a from i to ii

Disatnce travelled is 400m

235
Niamh  Poole
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