Question
Define gravitational force. Give its examples.
✓
Answer
Force of attraction between two (point) masses separated by a distance is called as gravitational force.
$F=G \frac{m_1 m_2}{r^2}$
where ' G ' is constant called the universal gravitational constant =
$6.67 \times 10^{-11} Nm ^2 / kg ^2$
Examples:
$F=G \frac{m_1 m_2}{r^2}$
where ' G ' is constant called the universal gravitational constant =
$6.67 \times 10^{-11} Nm ^2 / kg ^2$
Examples:
- The motion of moon, artificial satellites around the earth and motion of planets around the sun is due to gravitational force of attraction.
- The concept of weight of a body in the earth’s gravitational field is due to gravitational force exerted by the earth on a body.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What are some commonly known facts about magnetism?
Describe in detail formation of holes in ii. intrinsic semiconductor.
State and explain Kepler’s law of orbits.
Perform an experiment using a Vernier callipers of least count 0.01cm to measure the external diameter of a hollow cylinder. Take 3 readings at different positions on the cylinder and find (i) the mean diameter (ii) the absolute mean error and (iii) the percentage error in the measurement of diameter.
The Earth is rotating with angular velocity $ω$ about its own axis. $R$ is the radius of the Earth. If $Rω^2 = 0.03386 \ m/s^2,$ calculate the weight of a body of mass $100$ gram at latitude $25^\circ . (g = 9.8 \ m/s^2)$
→Explain the role of modulation.
List the conventions followed while using $\text{SI}$ units.
→A stone is thrown with an initial velocity components of $20 \ m/s$ along the vertical, and $15 \ m/s$ along the horizontal direction. Determine the position and velocity of the stone after $3 s.$ Determine the maximum height that it will reach and the total distance travelled along the horizontal on reaching the ground. $($Assume $g = 10 \ m/s^2)$
→A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend when viewed from two opposite points along the orbit of the Earth?
A particle is projected with speed v0 at angle θ to the horizontal on an inclined surface making an angle Φ (Φ < θ) to the horizontal. Find the range of the projectile along the inclined surface.