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What is the apparent weight felt by a person in an elevator, when it is accelerating (1) upward by "a", (2) downward by "a"

Posted by Vedha ..... 4 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 8 months ago

WHEN THE LIFT IS ACCELERATING UPWARD :
let the acceleration of lift be a
Reaction force=R=m(g+a)
Hence apparent weight of the a man is more than actual weight.

WHEN THE LIFT IS ACCELERATING DOWNWARD
REACTION FORCE=m(g-a)
hence apparent weight of man is less than actual weight .

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Derive the expression for finding the following in case of a projectile. A hiker stands on the edge of a cliff 490m above the ground and throws a stone horizontally with an initial speed of15ms

Posted by Mohammed Isa 4 years, 11 months ago

CBSE > Class 11 > Physics

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Principal of reductionism

Posted by Narayan Choudhary 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 6 months ago

Reductionism, in philosophy, a view that asserts that entities of a given kind are identical to, or are collections or combinations of, entities of another (often simpler or more basic) kind or that expressions denoting such entities are definable in terms of expressions denoting other entities.

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Find the angle of projection for which the horizontal range and the maximum height are equal

Posted by 〽__Priitam __05 4 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

Akash Kumar 4 years, 11 months ago

Tan-(4)

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Akash Kumar 4 years, 11 months ago

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define thermodynamics and first law of thermodynamics ?

Posted by Vaibhav Tyagi 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Bhawna Dahiya 4 years, 11 months ago

The baranch of science that deal with the study of diffrent form of energy and the quantitative relation between them is called thermodynamics. First law of thermodynamics :First law that energy is neither be created nor be destroyed it transfer from one form to another .

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Example 7.1 Find the centre of mass three particles at the vertices at equilateral triangle. The masses of particles are 100g, 150g and 200 respectively. Each side of the oquilaten trade is 0.5m long.

Posted by Rubadharshini .B 4 years, 11 months ago

CBSE > Class 11 > Physics

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A square plate of 20cm side moves over another plate with velocity 5 cm/s. Both plate immersed in water if the viscous force is 0.205 gf and viscosity of water is 0.01 poise. What is the separation between plate?

Posted by Aadya Singh 4 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 6 months ago

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An object having mass 100kg is taken up at the height of 3000km . Find the gravitational force exerted by the earth on that object at that height.

Posted by Ur____X____Bf Yash 4 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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Derive formula for displacement velocity and acceleration. Show graphically also

Posted by Vansh Bansal 4 years, 11 months ago

CBSE > Class 11 > Physics

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Adiabatic process

Posted by ⭐White Wolf⭐ 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Deepali Kumari 4 years, 10 months ago

q =0

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The position of a particle is given by r=3.0t î+2.0tj^+5.0k^ where t is in second and the coefficient have the proper units for r to be in metres (a)Find v(t) and a(t) of the particle . (b)Find the magnitude and direction of v(t) t=1.0s

Posted by Payal Labana 4 years, 11 months ago

CBSE > Class 11 > Physics

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Steel rod ? cm long is clamped at its middle. The fundamental frequency of the longitudinal vibrations of the road are given to be 2.53 khz. What is the speed of sound in *steel*.

Posted by ᵐꜞᔆᔆ᭄ Qᴜᴇᴇɴ✿࿐꧂ : ꨄ︎•, 4 years, 11 months ago

CBSE > Class 11 > Physics

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In a ballistics demonstration a police

Posted by Sirsha Mitra 4 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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Boyels law in phyics

Posted by ⭐White Wolf⭐ 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Aarzoo A 4 years, 11 months ago

P¹V¹ = K¹ --(1) Similarly P²V² = K² --(2) From 1 and 2 P¹V¹ = P²V² P¹/P² = V²/V¹

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Discuss the importance of coefficient of restitution in elastic and inelastic collisions

Posted by Jasbir Singh 4 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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Derive range

Posted by Krash Ojha 4 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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What is equilibrium

Posted by ⭐White Wolf⭐ 4 years, 11 months ago

CBSE > Class 11 > Physics

3 answers

Deepali Kumari 4 years, 10 months ago

The best example of eqillbrium is pendulum.....

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๛Singh 父Âkhand父 4 years, 11 months ago

The state at which the rate of forward reaction is equal to the rate of backward reaction

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Tec Om 4 years, 11 months ago

the state at which the rate of forward reaction is equal to the rate of backward reaction

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If a wire of length 4 m and cross-sectional area of 2m2 is stretched by a force of 3 kN, then determine the change in length of the wire due to the applied force. Given Young's modulus of material of the wire is110 109 N/m.

Posted by Anjali Soni 4 years, 11 months ago

CBSE > Class 11 > Physics

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If the motion of a particle is governed by the equation s=2t3 -3t2 + 2 metres ,find the position velocity and acceleration of the particle at t = 2 sec.

Posted by Manshi Hansa 4 years, 11 months ago

CBSE > Class 11 > Physics

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Thermodynamics....?

Posted by Royal Thakur ? 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Aadya Singh 4 years, 11 months ago

Hii ?

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<font size=56><font color=pink>Young's modulus of copper<font size><font color>

Posted by Class 12 4 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Class 12 4 years, 11 months ago

Answer please first name

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Why Cp is greater than Cv??

Posted by Lau Kumar 4 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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Bulk modulus of elasticity? ?

Posted by Aadya Singh 4 years, 11 months ago

CBSE > Class 11 > Physics

4 answers

Deepali Kumari 4 years, 10 months ago

B=-PV/∆V

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Ranger King 4 years, 11 months ago

Bulk modulus = (\Delta P.\frac{V}{\Delta V}ΔP.ΔVV.),SI unit=Nm–2,

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Class 12 4 years, 11 months ago

B = P(extra) ( STRAIN)/(DELTA V/V)
P here is extra pressure applied by liquid (pressure applied on object by liquid) on object other than the atmospheric pressure,when object is emmersed in liquid ...........delta v is change in volume of object after it is dipped in liquid.....and v is initial volume of object before putting it in liquid

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Śěřãj The Cute? 4 years, 11 months ago

Happy makar snkrat aadu ?

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Shearing stress?

Posted by Aadya Singh 4 years, 11 months ago

CBSE > Class 11 > Physics