Questions asked by Hp

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• A ball moving with velocity 20 m/s hit a wall vertically and followed the same path.If in this process its velocity becomes 20% of the previous value,find the coefficient of restitution?? Assume no effect of gravity on this horizontal motion
  
• A particle is moving on a linear pathway whose acceleration varies as #a=2x#(where, x is its distance covered) If it had started from rest(zero velocity when x=0),find an equation to suggest its velocity-displacement relationship? How to solve? Pls help
  
• A particle undergoing S.H.M having its velocity (#v#) and displacement from mean position (#x#) relation plotted as a circle of equation #v^2 + x^2 =3# Find,its angular velocity?
  
• Slope of Force-position curve of a particle undergoing S.H.M is -4,find the mass of the particle if it has a time period of 0.2s ?
  
• A transverse wave is given by the equation #y=y_0 sin 2pi(ft-x/lambda)# The maximum particle velocity will be #4# times the wave velocity if, A. #lambda =(pi y_0)/4# B.#lambda =(pi y_0)/2# C.#lambda =pi y_0# D.#lambda =2 pi y_0# ?
  
• Two bodies of masses #m1# and #m2# are separated by a distance #R#.The distance of the centre of mass of the bodies from the mass #m1# is #A.(m2R)/(m1+m2)#. #B(m1R)/(m1+m2)# #C. (m1m2R)/(m1+m2) ?
  
• In the solid state #PCl_5# exists as, A.#[PCl_4]^(-)# & #[PCl_6]^-# B.covalent #PCl_5# molecules only C.#[PCl_4]^+ & [PCl_6]^- # ions D.covalent #P_2Cl_10# molecules only ?
  
• What is the phase difference between two simple harmonic motions represented by #x1=A sin(omegat +pi/6)# and #x2=A cos omegat# A. #pi/6# B. #pi/3# C. #pi/2# D. #(2pi)/3# ?
  
• The stability if #Me_2 C=CH_2# is more than that of #MeCH_2CH=CH_2# due to A. Inductive effect of #Me# group B. Resonance effect of #Me# group C. Hyperconjugative effect of #Me# group D. Resonance as well as inductive effect of #Me# group ?
  
• In a thermometer the ice point is marked as #10# degree Celsius,and steam point as #130# degree Celsius .What will be the reading of this scale when it is actually #40# degree Celsius?