1
JEE Main 2023 (Online) 11th April Morning Shift
+4
-1

An average force of $$125 \mathrm{~N}$$ is applied on a machine gun firing bullets each of mass $$10 \mathrm{~g}$$ at the speed of $$250 \mathrm{~m} / \mathrm{s}$$ to keep it in position. The number of bullets fired per second by the machine gun is :

A
25
B
50
C
5
D
100
2
JEE Main 2023 (Online) 10th April Morning Shift
+4
-1

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

A
$$v$$
B
$$\frac{v}{3}$$
C
$$\frac{v}{4}$$
D
$$\frac{v}{2}$$
3
JEE Main 2023 (Online) 31st January Morning Shift
+4
-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

A
$$\frac{200 m v}{t}$$
B
$$\frac{100 m v}{t}$$
C
$$\frac{m v}{100 t}$$
D
$$200 m v t$$
4
JEE Main 2023 (Online) 30th January Evening Shift
+4
-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
A
$0.02 \mathrm{~m} / \mathrm{s}$
B
$1.5 \mathrm{~m} / \mathrm{s}$
C
$2.5 \mathrm{~m} / \mathrm{s}$
D
$0.6 \mathrm{~m} / \mathrm{s}$
EXAM MAP
Medical
NEET