a train moving with a velocity of 20 m/s is brought to rest by applying brakes in 5 s calculate the retardation
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Answered by
14
Heya!
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◾Given that ,
============
Initial Velocity U = 20 m/s
Time t = 5 seconds
Final velocity V = 0 [ Bought to Rest
Retardation = ?
⭐Using the first equation of motion,
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V = U + AT
20 + 5A = 0
20 = -5 A
A = -4 m/s²
-----------------------------------------------------------------------------------------------------
--------
-----------------------------------------------------------------------------------------------------
◾Given that ,
============
Initial Velocity U = 20 m/s
Time t = 5 seconds
Final velocity V = 0 [ Bought to Rest
Retardation = ?
⭐Using the first equation of motion,
---------------------------------------------------
V = U + AT
20 + 5A = 0
20 = -5 A
A = -4 m/s²
-----------------------------------------------------------------------------------------------------
Answered by
3
retardation (negative acceleration)=velocity × time
=20×5
=100m/s^2
=20×5
=100m/s^2
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