a car is moving with a velocity v . on applying brakes it comes to rest . write down the changed equations of motion for the car
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Substituting v = 0 m/s in equations of kinematics
0 = u + at
s = ut - 1/2 at^2
0 = u^2 - 2as
abdulrehman38:
can you explain this plz??
These are simply equations of kinematics that are obtained by calculus. Here the final velocity will be zero so we put v = 0 and as motion is retarding acceleration will be negative.
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The work done by the braking force when applied to a moving vehicle is negative. Despite the vehicle's displacement moving ahead, the braking force works in the opposite direction.
the changed equations of motion for the car
- v = 0 m/s being substituted in kinematic equations
we know that v= u + at putting v=0m/s
0=u+at
- S=ut+1/2at^2. This equation, often known as the second equation of motion, is used to determine how far something has been travelled.
s = ut - 1/2 at^2
0 = u^2 - 2as
The used equation is s = ut + 12at2, and it is changed below to demonstrate how to solve for each variable separately.
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