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प्रश्न
Saphira moves at a constant speed in the same direction. Rephrase the same sentence in fewer words using concepts related to motion.
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उत्तर
She moves in a straight line with constant velocity.
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संबंधित प्रश्न
Name the two quantities, the slope of whose graph give acceleration.
Study the speed-time graph of a car given alongside and answer the following questions:
(i) What type of motion is represented by OA ?
(ii) What type of motion is represented by AB ?
(iii) What type of motion is represented by BC ?
(iv) What is the acceleration of car from O to A ?
(v)What is the acceleration of car from A to B ?
(vi) What is the retardation of car from B to C ?
Draw a displacement-time graph for a boy going to school with uniform velocity.
A train starting from rest picks up a speed of 20 ms−1 in 200 s. It continues to move at the same rate for the next 500 s and is then brought to rest in another 100 s.
- Plot a speed-time graph.
- From graph calculate
(a) uniform rate of acceleration
(b) uniform rate of retardation
(c) total distance covered before stopping
(d) average speed.
A ball is thrown up vertically and returns back to thrower in 6 s. Assuming there is no air friction, plot a graph between velocity and time. From the graph calculate
- deceleration
- acceleration
- total distance covered by ball
- average velocity.
From the velocity – time graph given below, calculate Distance covered in the region ABCE.
What can you conclude if the speed-time graph of a body is a curve moving upwards starting from the origin?
Given below are the speed -time graphs. Match them with their corresponding motions :
 |
(a) Uniformity retared motion |
 |
(b) Non-uniformity acceleration |
 |
(c) Non-uniform motion |
 |
(d) uniform motion |
Derive the equation
S = ut+ `1/2` at2
Using a speed- time graph
The slope of the speed–time graph gives ______.
