Advertisements
Advertisements
प्रश्न
How can you find the following?
Acceleration from velocity – time graph.
Advertisements
उत्तर
Acceleration from velocity – time graph: Velocity – time graph for uniform motion in a straight line (OP) inclined to the time axis.

Take any two points A and B on this graph. From A and B draw perpendicular on the time axis as well as velocity axis in such a way that
OA1 = t1, OB1 = t2, OA2 = v1 and OB2 = v2
Slope of v – t graph = `"BC"/"AC"`
= `("v"_2-"v"_1)/("t"_2-"t"_1)=(Δ"v")/(Δ"t")` = Acceleration of the body
So, by knowing the slope of velocity – time graph for uniform motion, we can find the acceleration of the body.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word :
If a body moves with uniform velocity, its acceleration is ..............
A bus running at a speed of 18 km/h is stopped in 2.5 seconds by applying brakes. Calculate the retardation produced.
A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
Write three equations of uniformly accelerated motion relating the initial velocity (u), final velocity (v), time (t), acceleration (a) and displacement (S).
Multiple choice Question. Select the correct option.
A body dropped from the top of a tower reaches the ground in 4s. Height of the tower is
How can you find the following?
Velocity from acceleration – time graph.
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?

How will the equations of motion for an object moving with a uniform velocity change?
A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Fig.8.4. Plot a velocity-time graph for the same.

