Subject: Physics, asked on 1/5/18

## a 1kg hockey puck travelling at 2m/s collides with a 2kg hockey puck. the two pucks fly apat after the collision what is the velocity of 2kg puck

Subject: Physics, asked on 27/4/18

## A particle is rotated in a vertical circle by connecting it to a string of length l and keeping the other end of the string fixed. The minimum speed of the particle hen the string is horizontal for which the particle ill complete the circle is

Subject: Physics, asked on 17/4/18

## Solve this: Q.12. A metallic wire of 1 m length has a mass of 10 $×{10}^{-3}$ kg. If a tension of 100 N is applied to a wire, what is the speed of transverse wave? (1) 100 m${s}^{-1}$ (2) 10 m${s}^{-1}$ (3) 200 m${s}^{-1}$ (4) 0.1 m${s}^{-1}$

Subject: Physics, asked on 16/4/18

## two spring have force constant k1 and k2 (k1 > k2).on which spring is more work  done if, a) they are stretched by the same force and  b) they are stretched by the same amount

Subject: Physics, asked on 13/4/18

## 31. The capacitance of a parallel plate capacitor with air as dielectric is C. If a slab of dielectric constant  K and of the same thickness as the separation between the plates is introduced so as to fill 1/4th of the  capacitor (shown in figure), then the new capacitance is

Subject: Physics, asked on 11/4/18

## Q.33. A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel? (Take g = 10 m${s}^{-2}$) (a) 1250 J (b) 5000 J (c) 1000 J (d) 2500 J

Subject: Physics, asked on 4/4/18

## Q.32: 32. An engine develops 10KW of power. How much time will it take to lift a mass of 200kg to a height of 40m.                           (g=10ms-2) 1) 4s           2) 5s           3) 8s              4) 10s

Subject: Physics, asked on 4/4/18

## Solve this: ​Q15. A 2kg body is dropped from height of 1m onto a spring of spring constant 800 N/m as shown in the figure. A frictional force equivalent to 0.4 kg-wt acts on the body. The speed of the body just before striking the spring will be :    1) 1 m/s    2) 2 m/s     3) 3 m/s    4) 4 m/s

Subject: Physics, asked on 4/4/18

## Solve this: 22. A body of mass 2 kg is projected vertically up with a velocity of 100 ms-1. If it rises to a height of 400 m, the energy utilized to overcome friction is                               ( g=10 ms-2) 1) 10 KJ       2) 8 KJ              3) 1  KJ              4) 2 KJ

Subject: Physics, asked on 4/4/18

## Solve this: 27. A body is moving up an inclined plane of angle $\theta$ with an initial kinetic energy E. The coefficient of friction between the plane and body is $\mu$. The work done against friction before the body comes to rest is .

Subject: Physics, asked on 4/4/18

## Solve this: Q.18. A mason worker throws the bricks to a height of 10 m, at which the bricks reach with a velocity of 6 $m{s}^{-1}$. The percentage of energy he is wasting is nearly (g = 10 m${s}^{-2}$) 1) 15 % 2) 18 % 3) 220 % 4) 36 %

Subject: Physics, asked on 4/4/18

## work energy theorem for constant and variable force

Subject: Physics, asked on 4/4/18

## 12.  A rectangular plank of mass 'm1 'and height 'a' is on a horizontal surface.  On the top of it another rectangular plank of mass $\text{'}{m}_{2}\text{'}$ and height 'b' is placed.  The potential energy of the system is,

Subject: Physics, asked on 2/4/18

## Question no. 1 please Q.1. The momentum of a body is given by Find the force acting on the body at t = 2s.

Subject: Physics, asked on 30/3/18

## Solve this: Q.23. A ball strikes a horizontal floor normally. One-fourth of its kinetic energy is lost in collision. The coefficient of restitution of the collision is (1) $\frac{1}{2}$ (2) $\frac{\sqrt{3}}{2}$ (3) $\frac{1}{\sqrt{2}}$ (4) $\frac{1}{2\sqrt{2}}$

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