Advertisements
Advertisements
प्रश्न
To project the rockets which of the following principle(s) is /(are) required?
विकल्प
Newton’s third law of motion
Newton’s law of gravitation
law of conservation of linear momentum
both a and c
Advertisements
उत्तर
Both a and c
APPEARS IN
संबंधित प्रश्न
A rocket is fired from the earth towards the sun. At what distance from the earth’s centre is the gravitational force on the rocket zero? Mass of the sun = 2 ×1030 kg, mass of the earth = 6 × 1024 kg. Neglect the effect of other planets etc. (orbital radius = 1.5 × 1011 m).
Which of the Kepler’s laws of planetary motion led Newton to establish the inverse-square rule for gravitational force between two bodies ?
State the universal law of gravitation. Name the scientist who gave this law.
Can two particles be in equilibrium under the action of their mutual gravitational force? Can three particles be? Can one of the three particles be?
The gravitational field in a region is given by \[E = \left( 2 \overrightarrow{i} + 3 \overrightarrow{j} \right) N {kg}^{- 1}\] . Show that no work is done by the gravitational field when a particle is moved on the line 3y + 2x = 5.
[Hint : If a line y = mx + c makes angle θ with the X-axis, m = tan θ.]
How will the force of gravitation between two objects change if the distance between them is:
Doubled
At what height above the earth's surface would the value of acceleration due to gravity be half of what it is on the surface? Take the radius of earth to be R.
Name and state the action and reaction in the following case:
Hammering a nail.
State Newton's law of gravitation. What is the difference between:
g and G?
Particles of masses 2M, m and M are respectively at points A, B and C with AB = ½ (BC). m is much-much smaller than M and at time t = 0, they are all at rest (Figure). At subsequent times before any collision takes place ______.
