1
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1

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
2
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1

What percentage of kinetic energy of a moving particle is transferred to a stationary particle when it strikes the stationary particle of 5 times its mass?

(Assume the collision to be head-on elastic collision)

A
50.0%
B
66.6%
C
55.6%
D
33.3%
3
JEE Main 2022 (Online) 26th June Morning Shift
+4
-1

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 2021 (Online) 31st August Morning Shift
+4
-1
A body of mass M moving at speed V0 collides elastically with a mass 'm' at rest. After the collision, the two masses move at angles $$\theta$$1 and $$\theta$$2 with respect to the initial direction of motion of the body of mass M. The largest possible value of the ratio M/m, for which the angles $$\theta$$1 and $$\theta$$2 will be equal, is :
A
4
B
1
C
3
D
2
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