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The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
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16%
1
45%
2
29%
3
10%
4
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A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is
Anonymous Quiz
29%
3
31%
0
33%
2
7%
1
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A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is
Anonymous Quiz
19%
10
42%
12
27%
9
12%
6
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Which one of the following is the unit of velocity?
Anonymous Quiz
10%
Kilogram
70%
M/s
14%
Meter
6%
Gram
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body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is
Anonymous Quiz
22%
10
47%
5
15%
6
15%
20
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The change in velocity corresponding to the time interval within which the change has accelerated is known as _________________
Anonymous Quiz
20%
Speed
37%
Instant velocity
17%
Uniform motion
26%
Average accleration
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Which among the following can be zero when a particle is in motion for some time.
Anonymous Quiz
9%
Speed
42%
Force
44%
Displacement
4%
Time
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The ratio of the average velocity and average speed of a body is
Anonymous Quiz
20%
1
44%
More than1
29%
Less than 1
8%
1 or less than 1
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National Botanical Research Institute is located in
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21%
Kanpur
22%
Banaras
53%
Lucknow
4%
Meerut
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Forwarded from Shubham Jha - Class 7 & 8
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