1
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Three particles P, Q and R are moving along the vectors $$\overrightarrow A = \widehat i + \widehat j$$, $$\overrightarrow B = \widehat j + \widehat k$$ and $$\overrightarrow C = - \widehat i + \widehat j$$ respectively. They strike on a point and start to move in different directions. Now particle P is moving normal to the plane which contains vector $$\overrightarrow A$$ and $$\overrightarrow B$$. Similarly particle Q is moving normal to the plane which contains vector $$\overrightarrow A$$ and $$\overrightarrow C$$. The angle between the direction of motion of P and Q is $${\cos ^{ - 1}}\left( {{1 \over {\sqrt x }}} \right)$$. Then the value of x is _______________.
2
JEE Main 2021 (Online) 18th March Morning Shift
Numerical
+4
-1
A person is swimming with a speed of 10 m/s at an angle of 120$$^\circ$$ with the flow and reaches to a point directly opposite on the other side of the river. The speed of the flow is 'x' m/s. The value of 'x' to the nearest integer is __________.
3
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
A swimmer can swim with velocity of 12 km/h in still water. Water flowing in a river has velocity 6 km/h. The direction with respect to the direction of flow of river water he should swim in order to reach the point on the other bank just opposite to his starting point is ____________$$^\circ$$. (Round off to the Nearest Integer) (Find the angle in degrees)
4
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
The speed verses time graph for a particle is shown in the figure. The distance travelled (in m) by the particle during the time interval t = 0 to t = 5 s will be________. JEE Main Subjects
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