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## H. C. Verma Solutions – Chapter 8, Question 21

H. C. Verma, Chapter 8, Question number 21 A projectile is fired from the top of a 40 m high cliff with an initial speed of 50 m/s at an unknown angle. Find its speed when it hits the ground. Let us take the ground to be at zero potential. The initial mechanical energy of […]

## H. C. Verma Solutions – Chapter 9, Question 15

H. C. Verma, Chapter 9, Question number 15 Find the ratio of the linear momenta of two particles of masses 1 kg and 4 kg if their kinetic energies are equal. Let us denote the mass of 1kg particle by m1, mass of 4 kg particle by m2, velocity of 1 kg particle by v1 […]

## Why Do We Play Games?

Hey, Vsauce. Michael here. Why do humans play games? Whether it’s a video game or a board game or a physical game, like soccer – or football. I don’t have to put the ball in the net to survive, and, even if I did, why would I invite a goalie and another team? Games are […]

## CRASHING OUR HELICOPTER INTO A LAKE – Totally Accurate Battlegrounds Duos | Pungence

– I’m comin’! This is gonna be the closest call of all time. No! Oh he’s in the house! Dude, there’s a helicopter. Look at this, we’re flying. (laughs) Um, you need to turn left, uh oh. Alright, here we go. Are you on a truck? – [Skyzm] I am! Where are you? – I’m […]

## H. C. Verma Solutions – Chapter 3, Question 12

H. C. Verma, Chapter 3, Question number 12 A particle starts from a point A and travels along the solid curve as shown below. Find approximately the position B of the particle such that the average velocity between the positions A and B has the same direction as instantaneous velocity at B. If we assume […]

## H. C. Verma Solutions – Chapter 3, Question 8

H. C. Verma, Chapter 3, Question 8 The figure shows the graph of velocity versus time for a particle going along the x-axis. Find (a) the acceleration, (b) the distance travelled in 0 to 10 seconds and (c) the displacement in 0 to 10 seconds. Acceleration is given by change in velocity divided by time. […]

## Michio Kaku: The Universe in a Nutshell (Full Presentation)

My name is Professor Michio Kaku.  I’m a professor of theoretical physics at the City University of New York and I specialize in something called string theory.  I’m a physicist. Some people ask me the question, “What has physics done for me lately?  I mean, do I get better color television, do I get better […]