JEE Main 2023 (Online) 10th April Morning Shift | Center of Mass and Collision Question 28 | Physics

A particle of mass m moving with velocity v collides with a stationary particle of mass 2m. After collision, they stick together and continue to move together with velocity

$$v$$

$$\frac{v}{3}$$

$$\frac{v}{4}$$

$$\frac{v}{2}$$

JEE Main 2023 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

-1

100 balls each of mass $$\mathrm{m}$$ moving with speed $$v$$ simultaneously strike a wall normally and reflected back with same speed, in time $$\mathrm{t ~s}$$. The total force exerted by the balls on the wall is

$$\frac{200 m v}{t}$$

$$\frac{100 m v}{t}$$

$$\frac{m v}{100 t}$$

$$200 m v t$$

JEE Main 2023 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

A machine gun of mass $10 \mathrm{~kg}$ fires $20 \mathrm{~g}$ bullets at the rate of 180 bullets per minute with a speed of $100 \mathrm{~m} \mathrm{~s}^{-1}$ each. The recoil velocity of the gun is

$ 0.02 \mathrm{~m} / \mathrm{s}$

$1.5 \mathrm{~m} / \mathrm{s}$

$2.5 \mathrm{~m} / \mathrm{s}$

$0.6 \mathrm{~m} / \mathrm{s}$

JEE Main 2023 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

-1

As per the given figure, a small ball P slides down the quadrant of a circle and hits the other ball Q of equal mass which is initially at rest. Neglecting the effect of friction and assume the collision to be elastic, the velocity of ball Q after collision will be :

(g = 10 m/s²)

JEE Main 2023 (Online) 30th January Morning Shift Physics - Center of Mass and Collision Question 33 English