1
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A rifle bullet loses $$\left(\frac{1}{25}\right)$$th of its velocity in passing through a plank. The least number of such planks required just to stop the bullet is

A
5
B
10
C
11
D
13
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A uniform chain has a mass m and length $$l$$. It is held on a frictionless table with one-sixth of its length hanging over the edge. The work done in just pulling the hanging part back on the table is

A
$$\frac{mgl}{72}$$
B
$$\frac{mgl}{36}$$
C
$$\frac{mgl}{12}$$
D
$$\frac{mgl}{6}$$
3
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sphere and a hollow cylinder without slipping, roll down two separate inclined planes A and B, respectively. They cover same distance in a given duration. If the angle of inclination of plane A is 30$$^\circ$$, then the angle of inclination of plane B must be (approximately)

A
60$$^\circ$$
B
53$$^\circ$$
C
45$$^\circ$$
D
37$$^\circ$$
4
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Four spheres each of diameter $$2 a$$ and mass $$m$$ are placed in a way that their centers lie on the four corners of a square of side $$b$$. Moment of inertia of the system about an axis along one of the sides of the square is

A
$$\frac{8}{5} m a^2$$
B
$$\frac{4}{5} m a^2+5 m b^2$$
C
$$\frac{4}{5} m a^2+2 m b^2$$
D
$$\frac{8}{5} m a^2+2 m b^2$$
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