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750N and 250N in the respective cases; Method (b) Mass of the block, m= 25kg Mass of the man, M= 50kg Acceleration due to gravity, g= 10m/s² Force applied on the block, F= 25×10=500N Case (a): When the man lifts the block directly In this case, the man applies a force in the upward direction. This increases his apparent weight. Action on the floor by the man =250+500=750N Case (b): When the man lifts the block using a pulley In this case, the man applies a force in the downward direction. This descreases his apparent weight. Action on the floor by the man =500-250=250N If the floor can yield to a normal force of 700N, then the man should adopt the second method to easily lift the block by applying lesser force.

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Priyajit Patra 3 years, 2 months ago

answer

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Calculate the acceleration of 8kg block and 2 kg block

Posted by Meenakshi Parihar 3 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Aashay Tembhurne 3 years, 2 months ago

Limited info

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A tennis ball is dropped on to the floor from height of 4 m . It rebound its height 3 m . If the ball was in contact with floor for 0.010 sec , what was its average acceleration during contact ?

Posted by Sneha Gill 3 years, 2 months ago

CBSE > Class 11 > Physics

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integrate sec^ 2 x using limits 0 to 30 degree

Posted by Ghanshyam Jat 3 years, 2 months ago

CBSE > Class 11 > Physics

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Five equal forces of 10 N is are applied at the one point and all are lying in one point. If the angle between them are equal then find the value of resulted force

Posted by Aliya Khatoon 3 years, 2 months ago

CBSE > Class 11 > Physics

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What are functional forces

Posted by Jasim Akhtar 3 years, 2 months ago

CBSE > Class 11 > Physics

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What is called moderate size

Posted by Kashak Gilva 3 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Jasim Akhtar 3 years, 2 months ago

Medium in size

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Diksha Thakur 3 years, 2 months ago

Intermediate in size

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What is defination of dimensions

Posted by Baisa Hkm ?? 3 years, 2 months ago

CBSE > Class 11 > Physics

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Amritansh‌ Pandey 3 years, 2 months ago

Dimensions are the power in which fundamental units are raised in order to express the derived unit of a quantity.

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A discharge tube containing nitrogen gas at 25°C is evacuated till the pressure is 2x 10 -2 mm. if the volume of discharge tube is 2 litre, Calculate the number of nitrogen molecule still present in the tube. (R = 0.0821 L atm-1 mol -1 K-1

Posted by Pooja Dungriyal 3 years, 2 months ago

CBSE > Class 11 > Physics

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Impluse me integration ka. Use bhi hota hai Kya agar hota hai toh kaha pr hota hai

Posted by Sneha Rana 3 years, 2 months ago

CBSE > Class 11 > Physics

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a hammer weighing 1 kg moving with a speed of 10 m/s

Posted by Gurmeet Kaur 3 years, 2 months ago

CBSE > Class 11 > Physics

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What is physical quantities ?

Posted by Shivani Thakur 3 years, 2 months ago

CBSE > Class 11 > Physics

4 answers

Ashok Kumar 3 years, 1 month ago

All those quantities which can be measured by using physical instrument is called physical quantity.. For ex- length( meter scale) , temperature( thermometer), speed( speedometer)..

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Nites H Kumar 3 years, 2 months ago

All those quantities which can be measured directly or indirectly and in terms of which the laws of physics can be explained are called physical quantities

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Amritansh‌ Pandey 3 years, 2 months ago

The quantity which can measured by any instruments and which describe the physical world. PQ=n×u

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Aashay Tembhurne 3 years, 2 months ago

It is a quantity that can be measured. Example - length

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Dimensional analysis ke questions

Posted by Manorma Singh 3 years, 2 months ago

CBSE > Class 11 > Physics