1
IIT-JEE 2010 Paper 1 Offline
MCQ (More than One Correct Answer)
+3
-0.75
A point mass of 1 kg collides elastically with a stationary point mass of 5 kg. After their collision, the 1 kg mass reverses its direction and moves with a speed of 2 ms−1. Which of the following statement(s) is (are) correct for the system of these two masses?
A
Total momentum of the system is 3 kg ms−1
B
Momentum of 5 kg mass after collision is 4 kg ms−1
C
Kinetic energy of the centre of mass is 0.75 J
D
Total kinetic energy of the system is 4 J
2
IIT-JEE 2010 Paper 1 Offline
Numerical
+3
-0
A binary star consists of two stars A (mass 2.2Ms) and B (mass 11Ms), where Ms is the mass of the sun. They are separated by distance d and are rotating about their centre of mass, which is stationary. The ratio of the total angular momentum of the binary star to the angular momentum of star B about the centre of mass is
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3
IIT-JEE 2010 Paper 1 Offline
Numerical
+3
-0
Gravitational acceleration on the surface of a planet is $${{\sqrt 6 } \over {11}}g$$, where $$g$$ is the gravitational acceleration on the surface of the earth. The average mass density of the planet is $${2 \over 3}$$ times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms-1, the escape speed on the surface of the planet in kms-1 will be
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4
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+2
-0.5
A real gas behaves like an ideal gas if its
A
pressure and temperature are both high
B
pressure and temperature are both low
C
pressure is high and temperature is low
D
pressure is low and temperature is high
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