position of th⬠Sun S a3 shown in the figurc. Then. C. (1) KA>KB>It. (2) KB
1
A toy car with charge q moves on
The kinetic e4ercies of a planet in an elliptical tf," Sr", rt positions A. B snd C are "'Uii{toit KA, KB and Kc. rcspectively AC is the meior a-yis and SB is perp€ndicular to AC at the position of th€ Sun S a3 shown in the figurc. Then B C
6.
sphere is in rolling motiotr. In mlling body possesses translatioaal kinetic energy (IQ as vrell as rotatio[al kinetic ene4y (Kr) simultaneously. The ratio Iq : 0! + I!) for the sphere is
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Rotational kinetic energy
velocity
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If the
mass of the Eun werc ten times smaller and the univeBsl gravitational conEtant were ten times larger in magnitude. shich of tbe followiDg is not corr€ct ? Watking on the ground ivould become more
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Time period of a simple pendulum on the Earth would decrease. Raindmps rvill fall faster. on the Earth wil not
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A blocL of mass m is placed on a smooth inclin.d wedge ABC of iftlination 0 as shown in the figure. The wedge is given an acceleration a' towards the right. The rplation bclween a dnd u for the block to remain stationary or rh;\edg. is
(1) 5:7 , (2) 10:7 (s) 7:10
solid sphere is mtating freely about its symmetry axis jn free space. 1'he radiue of the sphere is increased keeping its mass sarne. Which of the following physical quaDtities would remain con-stant for the sphere ?
T\lo v'ires are made of the same mat€rial aDd] ,(l. halc rhe same volume. The fEst wire has (ross-sectional area A and the second wire hasl cross."ectional area 3A. If t}e lengtb of the first wire is increased by a, o+ applying a forc€ F, how much forcp is Deeded to streich the second
