Advertisements
Advertisements
प्रश्न
State the type of motion represented by the following sketches in Figures.
Give an example of each type of motion.
Advertisements
उत्तर
-
Type of Motion:Uniform Acceleration
-
The graph shows a straight line with a positive slope, indicating that velocity increases at a constant rate over time.
-
This means the object is accelerating uniformly.
Example:
A car increasing its speed steadily on a straight road (e.g., from 0 km/h to 60 km/h in 10 seconds at a constant rate). -
-
Type of Motion: Non-Uniform Retardation (Deceleration)
-
The graph shows a curved line with a decreasing slope, indicating that velocity is decreasing over time, but not at a constant rate.
-
This means the object is slowing down, and the rate of slowing down is changing.
Example:
A bicycle coming to a stop when brakes are applied gently and gradually. -
APPEARS IN
संबंधित प्रश्न
An object of mass 16 kg is moving with an acceleration of 3 m/s2. Calculate the applied force. If the same force is applied to an object of mass 24 kg, how much will be the acceleration?
The velocity-time graph for a uniformly retarded body is a straight line inclined to the time axis with an obtuse angle. How is retardation calculated from the velocity-time graph?
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
(a) Is the magnitude of acceleration higher or lower than that of retardation ? Give a reason .
(b) Compare the magnitude of acceleration and retardation .
When is the acceleration due to gravity negative?
Distinguish between uniformly and non-uniformly accelerated motions.
A car is moving with a speed of 50 km/h. One second later, its speed is 55 km/h. What is its acceleration?
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.
Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.
A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.
Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.
