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1
JEE Main 2021 (Online) 25th July Morning Shift
+4
-1
Water droplets are coming from an open tap at a particular rate. The spacing between a droplet observed at 4th second after its fall to the next droplet is 34.3 m. At what rate the droplets are coming from the tap ? (Take g = 9.8 m/s2)
A
3 drops / 2 sconds
B
2 drops / second
C
1 drop / second
D
1 drop / 7 seconds
2
JEE Main 2021 (Online) 20th July Evening Shift
+4
-1
A boy reaches the airport and finds that the escalator is not working. He walks up the stationary escalator in time t1. If he remains stationary on a moving escalator then the escalator takes him up in time t2. The time taken by him to walk up on the moving escalator will be :
A
$${{{t_1}{t_2}} \over {{t_2} - {t_1}}}$$
B
$${{{t_1} + {t_2}} \over 2}$$
C
$${{{t_1}{t_2}} \over {{t_2} + {t_1}}}$$
D
$${t_2} - {t_1}$$
3
JEE Main 2021 (Online) 20th July Morning Shift
+4
-1
A butterfly is flying with a velocity $$4\sqrt 2$$ m/s in North-East direction. Wind is slowly blowing at 1 m/s from North to South. The resultant displacement of the butterfly in 3 seconds is :
A
$$12\sqrt 2$$ m
B
20 m
C
3 m
D
15 m
4
JEE Main 2021 (Online) 18th March Evening Shift
The velocity $$-$$ displacement graph of a particle is shown in the figure.
The acceleration $$-$$ displacement graph of the same particle is represented by :