Advertisements
Advertisements
Question
Diagram shows a velocity – time graph for a car starting from rest. The graph has three sections AB, BC, and CD.
Is the magnitude of acceleration higher or lower than that of retardation? Give a reason.
Advertisements
Solution
Acceleration = slope of AB = `"Bt"/"At"="v"_0/"t"` ......(i)
Retardation = slope of CD = `"v"_0/(1/2"t")=2 "v"_0/"t"` ..........(ii)
∵ Magnitude of retardation is twice the magnitude of acceleration.
∴ Magnitude of acceleration is lower.
APPEARS IN
RELATED QUESTIONS
Derive the following equation of motion by the graphical method : v2 = u2 + 2as, where the symbols have their usual meanings.
What can you say about the motion of a body if:
its displacement-time graph is a straight line ?
A car of mass 1000 kg is moving with a velocity of 10 m s−1. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of car at the end of 25 s will be :
Multiple choice Question. Select the correct option.
The slope of displacement – time graph represents.
Represent the location of an object described as at 15 m, 45o west of north, on a graph paper.
How does the slope of a speed-time graph give the acceleration of a body moving along a straight line?
Draw the following graph:
Distance versus time for a body at rest.
Draw the following graph:
Speed versus time for a fluctuating speed.
Figure shows the distance-time graph of three students A, B and C. On the basis of the graph, answer the following :
When B meets A, where is C?
The area under the v-t graph represents a physical quantity that has the unit.
