NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXI08:GRAVITATION
360027
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
1 Apparent motion of sun around the earth
2 Phenomenon of day and night
3 Revolution of earth round the Sun
4 Deviation of the falling body towards earth
Explanation:
Conceptual Question
PHXI08:GRAVITATION
360028
Two equal masses separated by a distance \(d\) attract each other with a force \((F)\). If one unit of mass is transferred from one of them to the other, the force
1 Does not change
2 Decreases by \(\left( {G/{d^2}} \right)\)
3 Becomes \(d^{2}\) times
4 Increases by \(\left( {2G/{d^2}} \right)\)
Explanation:
Let \(m\) is the mass of each body \(F=\dfrac{G m^{2}}{d^{2}}\) After transferring unit mass \(F^{\prime}=\dfrac{G(m+1)(m-1)}{d^{2}}=\dfrac{G\left(m^{2}-1\right)}{d^{2}}=\dfrac{G m^{2}}{d^{2}}-\dfrac{G}{d^{2}}\) So the force decreases by \(\dfrac{G}{d^{2}}\)
PHXI08:GRAVITATION
360029
The distance of the centres of moon and earth is \(D\). The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force on a particle will be zero
360030
The figure shows four arrangements of three particles of equal masses. Rank the arrangement according to the magnitude of the net gravitational force on the particle marked \(m\), greatest first
1 \(a\), tie of \(c\) and \(d\), then \(b\)
2 \(a,d,c,b\)
3 \(b,c,d,a\)
4 \(d,c,a,b\)
Explanation:
In arrangement \(a\), both forces act in the same direction. In arrangement \(b\), both the forces act in opposite directions. This alone decides in favour of option (1).
360027
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
1 Apparent motion of sun around the earth
2 Phenomenon of day and night
3 Revolution of earth round the Sun
4 Deviation of the falling body towards earth
Explanation:
Conceptual Question
PHXI08:GRAVITATION
360028
Two equal masses separated by a distance \(d\) attract each other with a force \((F)\). If one unit of mass is transferred from one of them to the other, the force
1 Does not change
2 Decreases by \(\left( {G/{d^2}} \right)\)
3 Becomes \(d^{2}\) times
4 Increases by \(\left( {2G/{d^2}} \right)\)
Explanation:
Let \(m\) is the mass of each body \(F=\dfrac{G m^{2}}{d^{2}}\) After transferring unit mass \(F^{\prime}=\dfrac{G(m+1)(m-1)}{d^{2}}=\dfrac{G\left(m^{2}-1\right)}{d^{2}}=\dfrac{G m^{2}}{d^{2}}-\dfrac{G}{d^{2}}\) So the force decreases by \(\dfrac{G}{d^{2}}\)
PHXI08:GRAVITATION
360029
The distance of the centres of moon and earth is \(D\). The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force on a particle will be zero
360030
The figure shows four arrangements of three particles of equal masses. Rank the arrangement according to the magnitude of the net gravitational force on the particle marked \(m\), greatest first
1 \(a\), tie of \(c\) and \(d\), then \(b\)
2 \(a,d,c,b\)
3 \(b,c,d,a\)
4 \(d,c,a,b\)
Explanation:
In arrangement \(a\), both forces act in the same direction. In arrangement \(b\), both the forces act in opposite directions. This alone decides in favour of option (1).
360027
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
1 Apparent motion of sun around the earth
2 Phenomenon of day and night
3 Revolution of earth round the Sun
4 Deviation of the falling body towards earth
Explanation:
Conceptual Question
PHXI08:GRAVITATION
360028
Two equal masses separated by a distance \(d\) attract each other with a force \((F)\). If one unit of mass is transferred from one of them to the other, the force
1 Does not change
2 Decreases by \(\left( {G/{d^2}} \right)\)
3 Becomes \(d^{2}\) times
4 Increases by \(\left( {2G/{d^2}} \right)\)
Explanation:
Let \(m\) is the mass of each body \(F=\dfrac{G m^{2}}{d^{2}}\) After transferring unit mass \(F^{\prime}=\dfrac{G(m+1)(m-1)}{d^{2}}=\dfrac{G\left(m^{2}-1\right)}{d^{2}}=\dfrac{G m^{2}}{d^{2}}-\dfrac{G}{d^{2}}\) So the force decreases by \(\dfrac{G}{d^{2}}\)
PHXI08:GRAVITATION
360029
The distance of the centres of moon and earth is \(D\). The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force on a particle will be zero
360030
The figure shows four arrangements of three particles of equal masses. Rank the arrangement according to the magnitude of the net gravitational force on the particle marked \(m\), greatest first
1 \(a\), tie of \(c\) and \(d\), then \(b\)
2 \(a,d,c,b\)
3 \(b,c,d,a\)
4 \(d,c,a,b\)
Explanation:
In arrangement \(a\), both forces act in the same direction. In arrangement \(b\), both the forces act in opposite directions. This alone decides in favour of option (1).
360027
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
1 Apparent motion of sun around the earth
2 Phenomenon of day and night
3 Revolution of earth round the Sun
4 Deviation of the falling body towards earth
Explanation:
Conceptual Question
PHXI08:GRAVITATION
360028
Two equal masses separated by a distance \(d\) attract each other with a force \((F)\). If one unit of mass is transferred from one of them to the other, the force
1 Does not change
2 Decreases by \(\left( {G/{d^2}} \right)\)
3 Becomes \(d^{2}\) times
4 Increases by \(\left( {2G/{d^2}} \right)\)
Explanation:
Let \(m\) is the mass of each body \(F=\dfrac{G m^{2}}{d^{2}}\) After transferring unit mass \(F^{\prime}=\dfrac{G(m+1)(m-1)}{d^{2}}=\dfrac{G\left(m^{2}-1\right)}{d^{2}}=\dfrac{G m^{2}}{d^{2}}-\dfrac{G}{d^{2}}\) So the force decreases by \(\dfrac{G}{d^{2}}\)
PHXI08:GRAVITATION
360029
The distance of the centres of moon and earth is \(D\). The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force on a particle will be zero
360030
The figure shows four arrangements of three particles of equal masses. Rank the arrangement according to the magnitude of the net gravitational force on the particle marked \(m\), greatest first
1 \(a\), tie of \(c\) and \(d\), then \(b\)
2 \(a,d,c,b\)
3 \(b,c,d,a\)
4 \(d,c,a,b\)
Explanation:
In arrangement \(a\), both forces act in the same direction. In arrangement \(b\), both the forces act in opposite directions. This alone decides in favour of option (1).
