1
JEE Main 2024 (Online) 27th January Evening Shift
+4
-1

A bullet is fired into a fixed target looses one third of its velocity after travelling $$4 \mathrm{~cm}$$. It penetrates further $$\mathrm{D} \times 10^{-3} \mathrm{~m}$$ before coming to rest. The value of $$\mathrm{D}$$ is :

A
23
B
32
C
42
D
52
2
JEE Main 2023 (Online) 13th April Morning Shift
+4
-1

The ratio of powers of two motors is $$\frac{3 \sqrt{x}}{\sqrt{x}+1}$$, that are capable of raising $$300 \mathrm{~kg}$$ water in 5 minutes and $$50 \mathrm{~kg}$$ water in 2 minutes respectively from a well of $$100 \mathrm{~m}$$ deep. The value of $$x$$ will be

A
16
B
4
C
2
D
2.4
3
JEE Main 2023 (Online) 13th April Morning Shift
+4
-1

Two bodies are having kinetic energies in the ratio 16 : 9. If they have same linear momentum, the ratio of their masses respectively is :

A
$$3: 4$$
B
$$4: 3$$
C
$$9: 16$$
D
$$16: 9$$
4
JEE Main 2023 (Online) 12th April Morning Shift
+4
-1

Given below are two statements:

Statement I : A truck and a car moving with same kinetic energy are brought to rest by applying breaks which provide equal retarding forces. Both come to rest in equal distance.

Statement II : A car moving towards east takes a turn and moves towards north, the speed remains unchanged. The acceleration of the car is zero.

In the light of given statements, choose the most appropriate answer from the options given below

A
Statement I is incorrect but Statement II is correct.
B
Statement $$\mathrm{I}$$ is correct but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
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