1

JEE Main 2019 (Online) 12th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60

^{o}with ground level. But he finds the aeroplane right vertically above his position. If v is the speed of sound, speed of the plane is :2

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Two guns A and B can fire bullets at speeds 1 km/s and 2 km/s respectively. From a point on a horizontal ground, they are fired in all possible directions. The ratio of maximum areas covered by the bullets fired by the two guns, on the ground is -

3

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

The position co-ordinates of a particle moving in a 3-D coordinate system is given by

x = a cos$$\omega $$t

y = a sin$$\omega $$t and

z = a$$\omega $$t

The speed of the particle is :

x = a cos$$\omega $$t

y = a sin$$\omega $$t and

z = a$$\omega $$t

The speed of the particle is :

4

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+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 :

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

The general equation for its path is :

Questions Asked from Motion in a Plane (MCQ (Single Correct Answer))

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