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Q.
Two blocks kept on the smooth horizontal surfaces of masses 7kg and 3kg connected with a light string are pulled by applying a horizontal force of 40N as shown in the figure. The tension force (in N) in the string is-

Option: 1
28

Option: 2
12N

Option: 3
21N

Option: 4
None of the above

Q.
Calculate the acceleration of the system as shown in the figure , assume all the surfaces are smooth

Option: 1
g/3

Option: 2
g/4

Option: 3
g/2

Option: 4
g

Q.
The ratio of velocities of a planet at perigee and apogee $\frac{v_p}{v_a}$ is equal to -
Option: 1
1

Option: 2
$\frac{1-e}{1+e}$

Option: 3
$\frac{1+e}{1-e}$

Option: 4
$\frac{1+e^2}{1-e^2}$

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