19
Pig, 8.12
la) Find how far does the car travel in the first 4 seconds.
Shade the area on the graph that represents the distance
travelled by the car during the period,
(b) Which part of the graph represents uniform motion of the
car?
State which of the following situations are possible and giv
an example for each of these:
veloc
Answers
Answer:
Explanation:
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11th
Physics
Motion in a Straight Line
Speed and Velocity
The speed-time graph for a ...
PHYSICS
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Asked on October 15, 2019 by
Mirunalini Kousar
The speed-time graph for a car is shown in Fig.
(a) Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
(b) Which part of the graph represents uniform motion of the car?
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ANSWER
(a)
The total number of divisions on horizontal axis for 2 s is 5.
The total number of divisions on vertical axis for 2 m/s is 3.
The total displacement of the car during these two seconds will be given as the area under all these squares.
The area under the (3×5) squares is given as:
A
15
=2×2 = 4
So, the area under one small square is :
A
1
=
15
4
Now, the area under the graph for 4 sec is:
the number of squares under the graph is :
n=57 small squares + 6 half small squares
So, total number of squares =60.
So, the distance traveled by the car is the area under the curve.
S=60×
15
4
S=16 m