1
JEE Main 2019 (Online) 9th January Morning Slot
+4
-1
A particle is moving with a velocity

$$\overrightarrow v \, = K(y\widehat i + x\widehat j),$$ where K is a constant.

The general equation for its path is :
A
y = x2 + constant
B
y2 = x + constant
C
y2 = x2 + constant
D
xy = constant
2
JEE Main 2018 (Offline)
+4
-1
All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up.
A
B
C
D
3
JEE Main 2018 (Online) 15th April Evening Slot
+4
-1
A man in a car at location Q on a straight highway is moving with speed $$\upsilon$$. He decides to reach a point P in a field at a distance d from the highway (point M) as shown in the figure. Speed of the car in the field is half to that on the highway. What should be the distance RM, so that the time taken to reach P is minimum ?

A
d
B
$${d \over {\sqrt 2 }}$$
C
$${d \over 2}$$
D
$${d \over {\sqrt 3 }}$$
4
JEE Main 2018 (Online) 15th April Morning Slot
+4
-1
An automobile, travelling at $$40\,$$ km/h, can be stopped at a distance of $$40\,$$ m by applying brakes. If the same automobile is travelling at $$80\,$$ km/h, the minimum stopping distance, in metres, is (assume no skidding) :
A
$$45\,$$ m
B
$$100\,$$ m
C
$$150\,$$ m
D
$$160\,$$ m
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