Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 10 Answered

ex. 2a q 16
question image
Asked by nilesh.dhote74 | 30 Apr, 2020, 04:59: PM
answered-by-expert Expert Answer

a)

(i) Work done is same for both as both the people carry the same weight of water to the same height.

 

(ii) Power developed is

L e t space p o w e r space d e v e l o p e d space b y space f a t h e r space b e space P subscript f space a n d space t h a t space b y space a space b o y space b e space P subscript b P subscript b over P subscript f equals fraction numerator begin display style bevelled W over t subscript b o y end subscript end style over denominator begin display style bevelled W over t subscript f a t h e r end subscript end style end fraction equals t subscript f a t h e r end subscript over t subscript b o y end subscript P subscript b over P subscript f equals 2 over 3 P subscript b colon space P subscript f space equals 2 colon 3 b right parenthesis space M a s s space o f space w a t e r space l i f t e d space b y space b o t h space i s comma space m subscript w space equals space rho cross times V space equals space 10 cubed space cross times open parentheses 20 close parentheses cross times 10 to the power of negative 3 end exponent space equals space 20 space k g space H e n c e comma space w o r k space d o n e space i s comma space W space equals space m subscript w g h space equals space 20 cross times 9.8 cross times space 20 W space equals 3920 space J space equals space 3.92 space k J

Answered by Shiwani Sawant | 30 Apr, 2020, 06:06: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 10 - Physics
Assertion (A): In real and Ideal conditions, work done by a mass tied at the end of a string, rotating uniformly in a circle, is zero. Reason (R): Work done is never zero in vacuum conditions. (a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true but (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) Both (A) and (R) are false.
Asked by navycuber2738 | 29 Feb, 2024, 02:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
Hi, Solve this question. A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:  (a) the work done by the engine.  (b) the power of the engine.
Asked by anubhutiupadhaya | 18 Mar, 2023, 08:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
Please solve this.. Calculate the power spent by a crane while lifting a load of mass 2000 kg, at velocity of 1.5 m/s. (g = 10m * s ^ - 2)
Asked by sagarmishra | 18 Mar, 2023, 08:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
when the force is acted normally to the body then the workdone will be __________
Asked by diahant.taunk10 | 24 Nov, 2021, 08:46: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
1eV=HOW MANY JOULES  
Asked by ss130001.jashkaransingh | 14 Sep, 2021, 08:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
a coolie with a load of 30kg on his head, walks on the platform. if he walks a distance of 60m what is the work done by the coolie? how much energy is gained by a box of mass 20kg when a man runs carrying the box with a speed of 3m/s to catch the bus? what is the difference in the answers in these two questions? is the meaning the same, please explain.
Asked by saibaba1069 | 02 Apr, 2021, 08:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
what do you mean by one kilowatt hour
Asked by akash21gsk | 22 Jun, 2020, 08:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
How far must a 250 kg pile driver fall if it is to be capable of doing 12700 J of work?
Asked by snehalburud22.10spicertl | 11 Jun, 2020, 03:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
Derivation of w=mgh
Asked by sanjeevrao.2704 | 04 Jun, 2020, 08:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Physics
A BULLET OF MASS 5g TRAVELS WITH A SPEED OF 500ms-1. IF IT PENETRATES A FIXED TRAGET WHICH OFFERS RESISTIVE FORCE OF 1000 N TO THE MOTION OF BULLET FIND THE SPEED WITH WHICH THE BULLET EMERGES OUT OF TARGET IF TARGET IS OF THICKNESS 0.5m
Asked by mpandey358246.mp | 05 May, 2020, 02:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×