1
JEE Main 2023 (Online) 1st February Morning Shift
+4
-1

A child stands on the edge of the cliff $$10 \mathrm{~m}$$ above the ground and throws a stone horizontally with an initial speed of $$5 \mathrm{~ms}^{-1}$$. Neglecting the air resistance, the speed with which the stone hits the ground will be $$\mathrm{ms}^{-1}$$ (given, $$g=10 \mathrm{~ms}^{-2}$$ ).

A
20
B
25
C
30
D
15
2
JEE Main 2023 (Online) 31st January Morning Shift
+4
-1

The initial speed of a projectile fired from ground is $$\mathrm{u}$$. At the highest point during its motion, the speed of projectile is $$\frac{\sqrt{3}}{2} u$$. The time of flight of the projectile is :

A
$$\frac{u}{g}$$
B
$$\frac{2u}{g}$$
C
$$\frac{u}{2g}$$
D
$$\frac{\sqrt3u}{g}$$
3
JEE Main 2023 (Online) 31st January Morning Shift
+4
-1

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following

{Assume negligible air friction}

A
Metal ball will reach the earth's surface earlier than the insulating ball
B
Both will reach the earth's surface simultaneously.
C
Insulating ball will reach the earth's surface earlier than the metal ball
D
Time taken by them to reach the earth's surface will be independent of the properties of their materials
4
JEE Main 2023 (Online) 30th January Evening Shift
+4
-1
A vehicle travels $4 \mathrm{~km}$ with speed of $3 \mathrm{~km} / \mathrm{h}$ and another $4 \mathrm{~km}$ with speed of $5 \mathrm{~km} / \mathrm{h}$, then its average speed is
A
$3.75 \mathrm{~km} / \mathrm{h}$
B
$4.25 \mathrm{~km} / \mathrm{h}$
C
$3.50 \mathrm{~km} / \mathrm{h}$
D
$4.00 \mathrm{~km} / \mathrm{h}$
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