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A car moving along a straight path slows down and stops. The car is under which type of motion?
Uniform motion
Non-uniform motion
Circular motion
Periodic motion
Non-uniform motion
When a car slows down and stops while moving along a straight path, its speed decreases uniformly with time until it comes to rest. This type of motion, where velocity changes over time (specifically, decreases due to retardation or deceleration), is termed non-uniform motion.
When a car slows down and stops while moving along a straight path, its speed decreases uniformly with time until it comes to rest. This type of motion, where velocity changes over time (specifically, decreases due to retardation or deceleration), is termed non-uniform motion.
When you ride a bicycle and apply the brakes as you approach a red traffic light, your speed constantly decreases until you stop. You are not covering equal distances in equal time intervals, which is why your motion is non-uniform.
U-S-E: Uniform = Same speed; N-U-V: Non-Uniform = Variable speed (changes speed).
v=u+at тАФ First equation of motion where a is negative (retardation)
s=ut+21тАЛat2 тАФ Distance covered under constant acceleration/deceleration
v2=u2+2as тАФ Velocity-displacement relation
In uniform motion, a body covers equal distances in equal intervals of time along a straight line. In non-uniform motion, the object covers unequal distances in equal intervals of time, or its speed/velocity is changing. When brakes are applied to a car, a retarding force (friction between tires and the road) acts in the direction opposite to motion, causing negative acceleration (deceleration). As velocity changes continuously, it exemplifies non-uniform motion.
Non-uniform motion occurs when an object covers unequal distances in equal intervals of time or when its speed is not constant.
When a vehicle slows down, it experiences retardation (negative acceleration).
Uniform motion implies constant speed in a straight line (a=0).
Circular motion and periodic motion involve changes in direction or repetition over time, but slowing down on a straight path is fundamentally classified under non-uniform linear motion.
Allows safe stopping of vehicles using braking systems.
Essential for controlling speed in traffic conditions.
Kinetic energy is dissipated as heat and sound through friction during deceleration.
Applying brakes in cars, trains, and bicycles to bring them to a halt.
Landings of airplanes on runways.
| Feature | Uniform Motion | Non-uniform Motion |
|---|---|---|
Speed | Constant / Fixed | Changing / Variable |
Acceleration (a) | a=0 | aюАа=0 (Positive or Negative) |
Option A (Uniform motion) refers to motion along a straight line with constant speed.
Option C (Circular motion) involves movement along a curved path with changing direction.
Option D (Periodic motion) repeats itself after a fixed time interval (e.g., pendulum).
B is correct тАФ A car slowing down and stopping on a straight path experiences a changing
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