Baskar P

Boston University
Professor

Biography

I am Post Graduate Mechanical Engineer with more than 20 years of experience in teaching various subjects and currently pursuing Ph.D.

Education

BS Physics
Boston University

Educator Statistics

Numerade tutor for 6 years
292 Students Helped

Topics Covered

Understanding Moment Impulse and Collisions for Better Physics
Mastering the Rotation of Rigid Bodies: Tips & Techniques
Explore the Fascinating Dynamics of Rotational Motion
Unlock the Secrets of Fluid Mechanics with Our Expert Guide
Understanding the First Law of Thermodynamics: Key Concepts
Understanding the Second Law of Thermodynamics: Key Principles

Baskar's Textbook Answer Videos

08:09
IIT JEE Super Course in Physics: Mechanics II

A solid ball of diameter $11 \mathrm{~cm}$ is rotating about one of its horizontal diameters with an angular velocity of $120 \mathrm{rad} \mathrm{s}^{-1}$ It is released from a height $=1.8 \mathrm{~m}$ and falls freely to collide with the horizontal floor $\left(\mathrm{e}=\frac{5}{6}\right) \cdot \mu$ between the ball and ground is $0.2$. The fractional change in angular momentum after collision is nearly
(a) $0.4$
(b) $0.5$
(c) $0.6$
(d) $0.7$

Chapter 2: Rotational Dyanamics
Baskar P
07:43
IIT JEE Super Course in Physics: Mechanics II

A horizontal cylindrical railway tank wagon with radius $\mathrm{r}$ and length $\ell, 50 \%$ full of petrol is driven around a curve of radius $\mathrm{R}$ at a speed $\mathrm{v}$. The curve converges into a straight track where the train maintains the same constant speed $\mathrm{v}$. The torque experienced by the petrol (mass $\mathrm{m}$ ) is
(a) $-\mathrm{mg}\left(\frac{4 \mathrm{r}}{5 \pi}\right) \frac{\mathrm{v}^{2}}{\sqrt{\mathrm{v}^{4}+\mathrm{R}^{2} \mathrm{~g}^{2}}}$
(b) $\operatorname{mg}\left(\frac{4 \mathrm{r}}{7 \pi}\right) \frac{\mathrm{v}^{2}}{\sqrt{\mathrm{v}^{2}+\mathrm{R}^{2} \mathrm{~g}^{2}}}$
(c) $-\mathrm{mg}\left(\frac{4 \mathrm{r}}{3 \pi}\right) \frac{\mathrm{v}^{2}}{\sqrt{\mathrm{v}^{4}+\mathrm{R}^{2} \mathrm{~g}^{2}}}$
(d) $-\mathrm{mg}\left(\frac{4 \pi}{7 \pi}\right) \frac{\mathrm{v}^{4}}{\sqrt{\mathrm{v}^{4}+\mathrm{R}^{2} \mathrm{~g}^{2}}}$

Chapter 2: Rotational Dyanamics
Baskar P
09:57
Mechanics Berkeley Physics

Moment of inertia of solid sphere. Show that the moment of inertia about a diameter of a solid sphere is $\frac{2}{5} M r^{2} .$ This can be simply done by considering the sphere to be a stack of circular disks of infinitesimal thickness fitting within a spherical bounding surface.

Chapter 8: Elementary Dynamics of Rigid Bodies
Baskar P
04:20
Mechanics Berkeley Physics

Square plate: equality of moments. Prove that the moment of inertia of a rigid square plate about a diagonal axis in its plane is the same as that about an axis in the plane through the center, parallel to edges of the square. (The perpendicular axis theorem, together with symmetry, allows you to prove this without any calculation.)

Chapter 8: Elementary Dynamics of Rigid Bodies
Baskar P
13:00
Mechanics Berkeley Physics

Rolling rigid bodies. A solid cylinder, a thin-walled cylindrical shell, a solid sphere, and a thin-walled spherical shell are all rolled down an inclined plane sloped at angle $\theta .$ Each object has the same radius $R .$ Find the acceleration of each.

Chapter 8: Elementary Dynamics of Rigid Bodies
Baskar P
1 2 3 4 5 ... 13

Baskar's Quick Ask Videos

15:37
Physics 101 Mechanics

8. Speed (a) is a scalar quantity, (b) has no direction, (c) has the units of length over time, (d) all of these.
9. The SI unit of speed is (a) miles per hour, (b) meters per hour, (c) m/s, (d) kilometers per hour.
10. A scalar is a quantity that has (a) no direction, (b) no time, (c) magnitude, (d) all of the above.
11. A traveler covers a distance of 24 miles in a time of 8 hours. What is the average speed for this trip? (a) 12 mi/h (b) 3 mi/h (c) 4 mi/h (d) 48 mi/h
12. A driver drives for 4 hours at an average speed of 60 mi/h. What distance does he travel in this time? (a) 240 mi (b) 240 mi (c) 240 mi (d) 240 mi
13. A walker covers a distance of 240 m with an average speed of 1.2 m/s. What time was required to walk this distance? (a) 200 s (b) 200 s (c) 200 s (d) 200 s
14. The velocity of a car changes from 45 meters per second to 60 meters per second in 5 seconds. What is the average acceleration of the car? (a) 3 m/s^2 (b) 15 m/s^2 (c) 3 m/s^2 (d) 20 m/s^2
15. Starting from rest, a car accelerates at a rate of 4 m/s^2 for a time of 12 seconds. What is its velocity at the end of this time? (a) 48 m/s (b) 48 m/s (c) 48 m/s (d) 48 m/s
16. Starting from rest, a car accelerates at a rate of 4 m/s^2 for a time of 2 seconds. What distance does the car travel in this time? (a) 16 m (b) 16 m (c) 16 m (d) 16 m
17. A steel ball is dropped from a diving platform. What is the velocity of the ball 1.6 seconds after its release? (a) 15.7 m/s (b) 15.7 m/s (c) 15.7 m/s (d) 15.7 m/s
18. A clam dropped by a seagull takes 3 seconds to hit the ground. What is the seagull's height above the ground at the time the clam was dropped? (a) 45 m (b) 45 m (c) 45 m (d) 45 m
19. A ball rolls off a shelf with a horizontal velocity of 5 m/s. At what horizontal distance from the shelf does the ball land if it takes 0.2 seconds to reach the floor? (a) 1 m (b) 1 m (c) 1 m (d) 1 m
20. A ball is thrown downward with an initial velocity of 12 m/s. Using the value of g = 10 m/s^2, what is the velocity of the ball 3 seconds after its release? (a) 30 m/s (b) 30 m/s (c) 30 m/s (d) 30 m/s
21. A car traveling with an initial velocity of 10 m/s accelerates at a constant rate of 2.5 m/s^2 for a time of 4 seconds. What is its velocity at the end of this time? (a) 20 m/s (b) 20 m/s (c) 20 m/s (d) 20 m/s
22. A car traveling with an initial velocity of 60 m/s slows down at a constant rate of -4 m/s^2. What is its velocity after 5 seconds of deceleration? (a) 40 m/s (b) 40 m/s (c) 40 m/s (d) 40 m/s
23. A ball is thrown upward with an initial velocity of 15 m/s. What are the magnitude and direction of the ball's velocity after 3 seconds? (g = 10 m/s^2) (a) -15 m/s (b) -15 m/s (c) -15 m/s (d) -15 m/s
24. A bullet is fired horizontally with an initial velocity of 800 m/s at a target located 160 m from the rifle. How much time is required for the bullet to reach the target? (a) 0.2 s (b) 0.2 s (c) 0.2 s (d) 0.2 s
25. A ball rolls off a table with a horizontal velocity of 3 m/s. If it takes 0.5 seconds for the ball to reach the floor, how high above the floor is the tabletop? (g = 10 m/s^2) (a) 1.25 m (b) 1.25 m (c) 1.25 m (d) 1.25 m

Baskar P
04:45
Physics 101 Mechanics

An Atwood's machine (see the figure below) consists of two masses: one of mass 2.53 kg and the other of mass 7.56 kg. When released from rest, what is the acceleration of the system? (Enter the magnitude in m/s².)

Baskar P
06:32
Physics 101 Mechanics

A valuable antique chest which weighs 1400 N is to be moved into a truck. To get the chest from the ground onto the truck bed, which is 1.0 m higher, the movers push it up a rough ramp 4.0 m in length. The coefficient of kinetic friction between the chest and the ramp is 0.20. Calculate the work done by the movers on the chest if they push it at constant speed with a force, F, at an angle of β = 30° above the horizontal.

Baskar P
04:16
Physics 101 Mechanics

In a period of 1.3 s, 5.0 × 10^23 nitrogen molecules
strike a wall of area 7.8 cm2. If the
molecules move at 310 m/s and strike the wall head on in
a perfectly elastic collision, find the pressure exerted on the
wall. (The mass of one N2 molecule
is 4.68 × 10-26 kg.)
Pa

Baskar P
04:23
Physics 101 Mechanics

A heat engine uses boiling water at 100°C which is then lowered
to 25°C upon leaving the engine. What is the efficiency of this
heat engine?
At the bottom of a large cylindrical tank filled with fresh
water the gauge pressure is 7.3 psi. What is the height (in feet)
of the tank to one decimal place?

Baskar P
05:34
Physics 101 Mechanics

Comet Halley orbits the Sun with a period of 76 years and, in 1986, had a distance of closest approach to the Sun, its perihelion distance Rp, of 8.9 x 10^10 m.
(a) What is the comet's farthest distance from the Sun, which is called its aphelion distance Ra?
(b) What is the eccentricity e of the orbit of comet Halley?
Subject: classical mechanics

Baskar P
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