Question Answers
Sahay Sir > Question Answers
A bullet is fired vertically upwards with velocity v form the surface of a spherical planet. If the escape velocity from the planet is Vesc= V root N , then the value of N is (ignore energy loss due to atmosphere)
06
Oct
A bullet is fired vertically upwards with velocity v form the surface of a spherical planet. If the escape velocity from the planet is Vesc= V root N , then the value of N is (ignore energy loss due to atmosphere) A bullet is fired vertically upwards with velocity v form the surface of a [...]
In the figure XY and X’Y’ are two parallel tangents to a circle with centre O and and another tangent AB with point of contact C interesting XY at A and X’Y’ at B. Prove that ∠AOB=90 degree.
06
Oct
In the figure XY and X’Y’ are two parallel tangents to a circle with centre O and and another tangent AB with point of contact C interesting XY at A and X’Y’ at B. Prove that ∠AOB=90 degree. In the figure XY and X'Y' are two parallel tangents to a circle with centre O and [...]
A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB+CD=AD+BC.
06
Oct
A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB+CD=AD+BC. A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB+CD=AD+BC. October 6, 2020 Category: Chapter 10 - Circles , Maths , NCERT Class 10 ,
Two concentric circles are of radius 5 cm and 3 cm. Find the length of the chord of the larger circle which touches the smaller circle.
06
Oct
Two concentric circles are of radius 5 cm and 3 cm. Find the length of the chord of the larger circle which touches the smaller circle. Two concentric circles are of radius 5 cm and 3 cm. Find the length of the chord of the larger circle which touches the smaller circle. October 6, 2020 [...]
The length of a tangent from a point A at distance 5 cm from the centre of circle is 4 cm. Find the radius of the circle.
06
Oct
The length of a tangent from a point A at distance 5 cm from the centre of circle is 4 cm. Find the radius of the circle. The length of a tangent from a point A at distance 5 cm from the centre of circle is 4 cm. Find the radius of the circle. October [...]
Prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre of the circle.
06
Oct
Prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre of the circle. Prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre of the circle. October 6, 2020 Category: Chapter 10 - Circles , Maths , [...]
A planet of mass M, has two natural satellites with masses m 1 and m 2 . The radii of their circular orbits are R 1 and R 2 respectively. Ignore the gravitational force between the satellites. Define v 1 ,L 1 ,K 1 and T 1 to be respectively, the orbital speed, angular momentum, kinetic energy and time period of revolution of satellite 1; and v 2 ,L 2 ,K 2 and T 2 to be the corresponding quantities of satellite 2. Given m 1 /m 2 = 2 and R 1 /R 2 = 1/4, match the ratios in List – I to the numbers in List -II.
06
Oct
A planet of mass M, has two natural satellites with masses m 1 and m 2 . The radii of their circular orbits are R 1 and R 2 respectively. Ignore the gravitational force between the satellites. Define v 1 ,L 1 ,K 1 and T 1 to [...]
Tags:
A planet of mass M ,
angular momentum ,
has two natural satellites with masses m 1 and m 2 . The radii of their circular orbits are R 1 and R 2 respectively. Ignore the gravitational force between the satellites. Define v 1 ,
K 1 and T 1 to be respectively ,
K 2 and T 2 to be the corresponding quantities of satellite 2. Given m 1 /m 2 = 2 and R 1 /R 2 = 1/4 ,
kinetic energy and time period of revolution of satellite 1; and v 2 ,
L 1 ,
L 2 ,
match the ratios in List - I to the numbers in List -II. ,
the orbital speed ,
Prove that the tangents drawn at the end of a diameter of a circle are parallel.
06
Oct
Prove that the tangents drawn at the end of a diameter of a circle are parallel. Prove that the tangents drawn at the end of a diameter of a circle are parallel. October 6, 2020 Category: Chapter 10 - Circles , Maths , NCERT Class 10 ,
If tangents PA and PB from a point P to a circle with centre O are inclined to each other at angle of 80 degree, then ∠POA is equal to:
06
Oct
If tangents PA and PB from a point P to a circle with centre O are inclined to each other at angle of 80 degree, then ∠POA is equal to: If tangents PA and PB from a point P to a circle with centre O are inclined to each other at angle of 80 degree [...]
In Fig. 10.11, if TP and TQ are the two tangents to a circle with centre O so that angle POQ = 110 degree, then angle PTQ is equal to
06
Oct
In Fig. 10.11, if TP and TQ are the two tangents to a circle with centre O so that angle POQ = 110 degree, then angle PTQ is equal to if TP and TQ are the two tangents to a circle with centre O so that angle POQ = 110 degree In Fig. 10.11 then [...]