We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?
Both A and D will rotate at Same speed. Gears of the equal size will rotate at constant speeds despite or any sized gears in between them.
There is a place where if i stand up straight, i still be can considered sideways ?
The equator.
I stand up straight with respect to the ground, but is sideways with respect to the Earth axis.
You balance a broom horizontally on your finger such that your finger is present on the center of the gravity of the broom (precisely). You mark the spot and cut the broom into two halves. You are left with two pieces - one long piece with the handle and one short piece with bristles and a portion of handle.
If you weigh both the pieces now, what will happen?
a) The longer piece weighs more.
b) The shorter piece weighs more.
c) Both pieces weighs equal.
The shorter piece will weigh more.
This will happen because to hold the long piece, more torque is needed. You can see a live example if you make a fat kid sit on the opposite corner of the see-saw to a thin kid. The fat kid will have to sit closer in.
You have an empty wine bottle (too bad eh?) with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.
How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?
You just need a magnifying glass to do considering you are out in open with bright sun rays available to you. With the glass, you can burn through the string and thus making the ring drop to the bottom.
In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?
As you can see, the person at D dies straight through the object directly. The object then travels further and the see saw thing kills the person at the C as it has spikes below that. Upon falling, over the see saw, the blue object lifts up and then kill the person at B.The solution ends here, but just for fun, The E stands for Ebola and thus the person at A dies as well.Thanks to 9gag for this gif.
Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.
How will you plan your escape before you freeze to death on the frozen lake?
You have been told that the floor is ideally frictionless. Thus, all you need to do is throw your mobile phone in the opposite direction and the throw will propel you in the other direction. Since there is no friction, you will be able to glide smoothly to one side even with as little kick as this. This is same as firing a gun.
You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You dont have any other metal object in the room.
How will you decide which one of those is magnet?
This is pretty simple as the magnet has its magnetic field at poles in general. Then you can just keep one rod on the surface and bring the tip of the other rod towards the center. If the rod which is lying down gets attracted towards your rod, then the one you are holding is the magnet and if it does not then the one lying down is the magnet.
Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.
How will you do it ?
To achieve this, you must throw that ball as hard as you can in the air and gravity will bring it back to you.
When monkey rotate the gear, which mark will be hit 1 or 2 ?
2
As we know the gears in contact will always going to rotate in the opposite directions.