1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n $$-$$ 1 to t = n. The the ratio $${{{S_n}} \over {{S_{n + 1}}}}$$ is :
A
$${{2n} \over {2n - 1}}$$
B
$${{2n - 1} \over {2n}}$$
C
$${{2n - 1} \over {2n + 1}}$$
D
$${{2n + 1} \over {2n - 1}}$$
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is : (g = 10 m/s2)
A
340 m
B
320 m
C
300 m
D
360 m
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is given by :
A
0o
B
60
C
45o west
D
30o west
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Preeti reached the metro station and found that the escalator was not working. She walked up the sationary escalator in time t1. On another days, if she remains stationary on the the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator will be
A
$${{{t_1}{t_2}} \over {{t_2} - {t_1}}}$$
B
$${{{t_1}{t_2}} \over {{t_2} + {t_1}}}$$
C
$${{t_1} - {t_2}}$$
D
$${{{t_1} + {t_2}} \over 2}$$
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