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1
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
English
Hindi

A block of metal weighing 2 kg is resting on a frictionless plane (as shown in figure). It is struck by a jet releasing water at a rate of 1 kgs$$-$$1 and at a speed of 10 ms$$-$$1. Then, the initial acceleration of the block, in ms$$-$$2, will be :

A
3
B
6
C
5
D
4
2
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
English
Hindi

Two blocks of masses 10 kg and 30 kg are placed on the same straight line with coordinates (0, 0) cm and (x, 0) cm respectively. The block of 10 kg is moved on the same line through a distance of 6 cm towards the other block. The distance through which the block of 30 kg must be moved to keep the position of centre of mass of the system unchanged is :

A
4 cm towards the 10 kg block
B
2 cm away from the 10 kg block
C
2 cm towards the 10 kg block
D
4 cm away from the 10 kg block
3
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
English
Hindi
Bengali

An object is thrown vertically upwards. At its maximum height, which of the following quantity becomes zero?

A
Momentum
B
Potential Energy
C
Acceleration
D
Force
4
JEE Main 2022 (Online) 25th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
English
Hindi
Bengali

If force $$\overrightarrow F = 3\widehat i + 4\widehat j - 2\widehat k$$ acts on a particle position vector $$2\widehat i + \widehat j + 2\widehat k$$ then, the torque about the origin will be :

A
$$3\widehat i + 4\widehat j - 2\widehat k$$
B
$$- 10\widehat i + 10\widehat j + 5\widehat k$$
C
$$10\widehat i + 5\widehat j - 10\widehat k$$
D
$$10\widehat i + \widehat j - 5\widehat k$$
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