Ask a Doubt
Request a call back

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

NEET Class neet Answered

Solve it sir
question image
Asked by brijk456 | 01 Aug, 2019, 09:53: AM
answered-by-expert Expert Answer
As shown in figure, Let direction of foce P be along x-axis .
 
Resultant of two forces  R1= (P+Q cosθ) i + (Q sinθ) j
 
Magnitude of resultant, |R1| = [ P2 + Q2 + 2PQ cosθ ]1/2
 
when Q is doubled, resultant R2 = (P+2Q cosθ) i + (2Q sinθ) j
 
Manitde of resultant, |R2| = [ P2 + 4Q2 + 4PQ cosθ ]1/2
 
since |R2| = 2|R1| , we have , P2 + 4Q2 + 4PQ cosθ = 4(P2 + Q2 + 2PQ cosθ)  
 
Hence,  3P2 + 4PQ cosθ = 0  or  cosθ = -3P/(4Q)
Answered by Thiyagarajan K | 01 Aug, 2019, 17:25: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
NEET neet - Physics
3 masses of 16 kg and 8 kg and 4 kg are placed in contact as shown in the figure if a force of 140 newton is applied on 4 KG mass, then the force on 16kg will be
Asked by jhansikethburugu2008 | 04 Oct, 2024, 22:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
RMS velocity for certain di atomic at 27°c is 1930 find the gas
Asked by arfasamreen7766 | 13 Sep, 2024, 16:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
at thin wire has length of 21.7cm and radius 0.46mm calculate the volume of the wire to connect significant figures
Asked by mehekfz8738 | 02 Sep, 2024, 19:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
explain nature of magnetic field lines
Asked by muhammadifatimanoori | 22 Aug, 2024, 09:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
a parallel plate capacitor is charged up to a potential V distance between the plates is d. electric field intensity between the plates is E. if the distance between plates is doubled then the electric field will be
Asked by kumawatranya0812 | 16 Aug, 2024, 16:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
hailstones fall from a certain height if only 1% of the hailstones melt on reaching the ground find the height from which they fall
Asked by nzf1042692 | 10 Aug, 2024, 21:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
The position function of a particle moving along the x axis is x(t t 2 3t 2) time t=0 to t =3 find distance travelled
Asked by dropper744 | 08 Aug, 2024, 10:44: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
Ek pahiya 120 Chakkar Prati minut se ghoom raha hai to ghumte pahiye ki koniya Sal Hogi
Asked by sajnadevirrc | 06 Aug, 2024, 11:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
dimensional formula of heat energy
Asked by nainamalviya833 | 04 Aug, 2024, 20:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
NEET neet - Physics
when a body is moving with uniform speed in circular motion then it's angular momentum will be
Asked by juleerajput036 | 30 Jul, 2024, 19:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt