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Class 11
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Physics
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Motion in a Straight Line
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Speed and Velocity
Speed and Velocity
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Average Speed and Average Velocity
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Instantaneous Velocity and Instantaneous Speed
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Velocity - Time Graph
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Speed and Average Speed
5 mins
Velocity and Average Velocity
3 mins
Problem on Average Velocity
5 mins
Instantaneous speed, velocity, and acceleration
11 mins
Velocity - Time Graph - I
10 mins
Velocity - Time Graph - II
11 mins
Problems on Speed-Velocity -Time graph
7 mins
Quick Summary With Stories
Calculation of Speed and Average Speed
3 mins
Velocity and Average Velocity
2 mins
Instantaneous Speed, Velocity and Acceleration
4 mins
Problems on Instantaneous Velocity
2 mins
Speed-Time Graph
3 mins
Basics of Velocity-Time Graph
3 mins
Displacement From Velocity-Time Graph
2 mins
Velocity-Time Graph
3 mins
Simple Problem on Speed-Time Graph
2 mins
Simple Problem on Speed-Time Graph - II
2 mins
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Important Questions
A man walks on a straight road from his home to a market
$2.5km$
away with a speed of
$5kmh_{−1}$
. Finding the market closed, he instantly turns and walks back home with a speed of
$7.5kmh_{−1}$
. What is the
(a) magnitude of average velocity, and
(b) average speed of the man over the interval of time
(i)
$0$
to
$30min$
,
(ii)
$0$
to
$50min$
(iii)
$0$
to
$40min$
?
Hard
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>
A particle moving in a straight line covers half the distance with speed of
$3m/s$
. The other half of the distance is covered in two equal time interval with speed of
$4.5m/s$
and
$7.5m/s$
respectively. The average speed of the particle during this motion is
Medium
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>
The position of an object moving along x-axis is given by x = a +
$bt_{2}$
, where a = 8.5 m and b = 2.5 m
$s_{−2}$
and t is measured in seconds. The average velocity of the object between t = 2 s and t = 4 s is
Medium
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>
Joseph Jogs from one end
$A$
to the other end
$B$
of a straight
$300m$
road in
$2$
minutes
$30$
seconds and then turns around and jogs
$100m$
back to point
$C$
in another
$1$
minute. What are Joseph's average speeds and velocities in jogging (a) from
$A$
to
$B$
and (b) from
$A$
to
$C$
?
Medium
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>
A car travels from A to B at a, speed of
$20kmh_{−1}$
and returns at a speed of
$30kmh_{−1}$
. The average speed of the car for the whole journey is:
Medium
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>
Abdul, while driving to school, computes the average speed for his trip to be
$20$
km
$h_{−1}$
. On his return trip along the same route, there is less traffic and the average speed is
$30$
km
$h_{−1}$
. What is the average speed for Abdul's trip?
Medium
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>
A car travels half of the distance with constant velocity 40 km/h and another half with a constant velocity of 60 km/h along a straight line. The average velocity of the car is
Medium
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>
A driver of a car travelling at
$52$
km
$h_{−1}$
applies the brakes and accelerates uniformly in the opposite direction. The car stops in
$5$
s. Another driver going at
$3$
km
$h_{−1}$
in another car applies his brakes slowly and stops in
$10$
s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?
Medium
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>
A car moves a distance of 200 m. It covers the first half of the distance at speed 40 km/h and the second half of the distance at speed v. If the average speed is 48 km/h, then the value of v is-
Medium
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>
A car covers the first half the distance between two places at 40 km/h another half at 60 km/h, the average speed of car
Medium
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>