Advertisements
Advertisements
प्रश्न
The rate of change of velocity is ______.
Advertisements
उत्तर
The rate of change of velocity is acceleration.
APPEARS IN
संबंधित प्रश्न
Give one example of the following motion:
Uniform retardation
A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?
A train moving with a velocity of 20 ms−1 is brought to rest by applying brakes in 5 s. Calculate the retardation.
Give an example of an accelerated body, moving with a uniform speed.
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity and variable acceleration.
Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car Q between 2 s – 5 s.
A cyclist driving at 5 ms−1, picks a velocity of 10 ms−1, over a distance of 50 m. Calculate
- acceleration
- time in which the cyclist picks up above velocity.
A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
What is the SI unit of acceleration?
The initial velocity of a car is 10 ms-1. It moves with an acceleration of 2 ms-2. What will be its speed after 10 seconds?
State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
Distance travelled
From the given v-t graph it can be inferred that an object is
A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.
The slope of a velocity-time graph gives ______.
When a body starts from rest, the acceleration of the body after 2 seconds in ______ of its displacement.
Acceleration is a scalar.
It is possible to have objects moving with uniform speed but variable acceleration.
Assertion: When a body is subjected to a uniform acceleration, it is always moving in a straight line.
Reason: Motion may be straight-line motion or circular motion.
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
