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Ask KERALA Class 11 Science Physics question free ×

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# KERALA Class 11 Science Physics Free Doubts and Solutions

## When a body slides down from rest along a smooth inclined plane of angle 45degree with horizontal , it takes T time. When same body slides down a rough inclined plane making same angle & through same distance, It is seens to be taken pT, where p is some number greater than 1. Calculate the coefficient of friction between body and rough plane.

Asked by Jojo 6th March 2016, 9:04 PM

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## Sir, can you give me a detailed note on spring force?

Asked by kpshabnam 16th October 2015, 9:34 PM

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## A ball rolls off the edge of a 1.0m high table with a speed of 4.0m/s.How far horizontally from the edge of the table does the ball strike the floor?

Asked by mythili Suresh 26th September 2015, 10:22 AM

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## From the top of a cliff a ball is projected with a velocity of 24 m/s in a horizontal direction.At this instant a car at rest at a location 90m from the clif accelerates from rest at a constant acceleration of 4.0m/s^(2) toward the cliff.the ball hits the car. (a)How long is the rock in the air? (b)How high is the cliff?

Asked by mythili Suresh 26th September 2015, 10:14 AM

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## An engine pumps out water continuosly through a hose with a velocity v ,If miss the mass/unit length of water jet the rate at which K.E imparted is...? A)1/2(mv^2) B)1/2(mv^3)

Asked by mythili Suresh 21st September 2015, 1:51 PM

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## A stone is stopped from a height 'h' ,it hits the ground with a certain momentum p.If the samestoneis dropped from a height 100% more than the previous height,the momentum when it hits the groun will change by ............?

Asked by mythili Suresh 1st September 2015, 9:37 PM

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## So when the body moves up, acceleration= -g and the graph looks like what was drawn before for a decelerating body. Then when the body is moving downwards, acceleration= +g , now why does this graph have a curve similar to a decelerating body? Shouldn't the curve of this graph be in the opposite direction? How can I insert images here? It will be much easier to explain the question if I can upload images.

Asked by Deebu 20th March 2015, 1:36 PM

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## So if the shape is similar to that seen in an upwardly projected body doesn't it mean that the body is decelerating as it moves up and then continues to decelerate as it reaches maximum height and come back down? When a body is projected vertically upwards it is undergoing negative acceleration,right? After reaching maximum height when the object starts moving down is it still undergoing negative acceleration? Please explain.

Asked by Deebu 19th March 2015, 1:32 AM

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## If you draw the (s-t) graph of a decelerating body what will it look like?

Asked by Deebu 17th March 2015, 2:54 PM

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## In an displacement time graph doesn't the kind of curve shown above mean deceleration? So should the graph mean that when a body is projected vertically upwards the body is decelerating till it reach maximum height and the it is again decelerating downwards? How is this possible? when the body comes down from maximum height shouldn't the body be "accelerating" (because of the gravitational pull of the sun)? In the graph why does it look as if the body is decelerating?

Asked by Deebu 15th March 2015, 2:31 PM