1. A body starts from rest with a uniform acceleration
of 2 m s-2. Find the distance covered by the body
in 2 s.
OF Ans. 4 m
Answers
Answered by
4
Answer:
s=4m
Explanation:
according to Newton 's second law of motion,
s=ut+1/2 at^2
u=0 because the body starts from rest with a uniform acceleration.
s= 1/2 at^2
s= 1/2 2×4
s=4m
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Answered by
19
Answer:
The Initial velocity of the body = 0 m/s.
The uniform acceleration of the body = 2 m/s².
Time taken = 2 s.
Finding the final velocity of the body :
⇒ a = v - u/t
⇒ 2 = v - 0/2
⇒ v = 4 m/s
Finding the distance covered by the body :
⇒ s = ut + ½at²
⇒ s = 0*2 + ½*2*2²
⇒ s = 0 + 2²
⇒ s = 4 m
Hence, the distance travelled by the body in 2 s = 4 m.
Important Formulas :
- v = u + at
- s = ut + ½at²
- v² - u² = 2as
- V_BA = V_B - V_A
- V_AB = V_A - V_B
- Instantaneous velocity = dx/dt
- Instantaneous acceleration = dv/dt
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