Skip to main content

Answers to Physics Problems


This is true as the questions asked Yesterday were just simple questions requiring a good sense of  logic

So lets study each answer in detail

Question #1


















 Momentum = Mass * Velocity
So Initial Momentum (P1) = 50 kg * 4.8 m/s = 240 kg m/s
And Final Momentum (P2) = 50 kg * 5.4 m/s = 270 kg m/s

And the definition of Foce is
The rate of change of momentum in an object is equal/proportional to force applied
F = (P2 - P1) / Time

Which will give the unit as kg meter per second squared.
So (270 kg m/s - 240 m/s) / 3 seconds
=  (30 kgm/s) / 3 seconds
= 10 kg m/s squared

Also 1 kg m/s squared = 1 N
So 10 kg m/s squared = 10 N ------------ Answer

Question #2

Limiting Friction = 7.8 N (mew s * Normal)
Friction acting on block is zero as it is not in motion

That is it for today 
I will be back soon with more challenging physics problems

Till then Bye

Your
Universal Physics Expert 












Signing Off
Khushil


Comments

  1. Khushil Shah10 May 2019 at 13:33

    Today's post will be about " Good doesn't play dice "

    It will be interesting to read
    Get ready

    ReplyDelete

Post a Comment

Popular posts from this blog

Antimatter - The Long Lost Cousin of Matter

A beautiful quote by Paul Dirac Many of you physics lovers would have figured out what I am gonna talk about Yes, The contrary to matter - Antimattter So now let's have a brief insight about it Antimatter: Classical physics only allowed systems to have positive energy. But Dirac’s new theory of relativistic quantum mechanics allowed for a particle with negative energy solution, as a counterpart to the familiar positive-energy electron. After ruling out the possibility that this particle was simply the proton – which has a hugely greater mass – Dirac predicted the existence of a new particle with the same mass of the electron but with a charge that was positive rather than negative. It’s now understood that all particles have an equivalent antimatter particle with opposite charge and quantum spin – although some are their own antiparticle. However hardly any antimatter is seen in the observable universe, and why there should be vastly much more normal ma
5 comments
Read more

God Doesn't Play Dice

Hello Guys and welcome back to my blog !!! Today we are going to talk about a huge controversy on Science during 1920s...   Albert Einstein   is one of the greatest and certainly best known physicists. If you ask anyone to name a physicist the most common answer you will receive is “Einstein”. Einstein is also famous for his quotations. Among the many Einstein’s quotations one is particularly popular among the general public: “God does not play dice”. But what did Einstein mean by this? The quotation says, “Quantum theory yields much, but it hardly brings us close to the Old One’s secrets. I, in any case, am convinced He does not play dice with the universe.” It was addressed by Einstein to Max Born (one of the fathers of Quantum Mechanics) in a letter that he wrote to Born in 1926. The “Old one” and “He” Einstein refers to is God. The fame of this quotation stems from two sources: 1) Einstein’s disagreement with the fundamental concept of Quantum Mecha
4 comments
Read more

The duo of Waves and Particles

Hello guys and welcome back to my blog Today we are going to answer a question aboout explaining particle wave duality So hold tight and off we go Particle wave duality : Publicized early in the debate about whether light was composed of particles or waves, a wave-particle dual nature soon was found to be characteristic of electrons as well. The evidence for the description of light as waves was well established at the turn of the century when the photoelectric effect introduced firm evidence of a particle nature as well. Wave-particle duality , possession by physical entities (such as  light  and  electrons ) of both wavelike and particle-like characteristics. On the basis of experimental evidence, German physicist  Albert Einstein  first showed (1905) that  light , which had been considered a form of  electromagnetic waves , must also be thought of as particle-like, localized in packets of discrete  energy . The observations of the  Compton effect  (1922) by Ameri
2 comments
Read more