Question 1 :
A car falls off a ledge and drops to the ground in 0.5 s. Let $g = 10 \ m s^{–2}$ (for simplifying the calculations).What is its speed on striking the ground?
Question 2 :
Can we call the gravitational force between the Earth and an object as gravity?
Question 3 :
The motion of the moon around the earth is due to the _____________.
Question 4 :
The force that causes acceleration and keeps the body moving along the circular path acting towards the centre is called ________.
Question 5 :
Relative density of silver is 10.8. The density of water is $10^3 \ kg/m^{3}$. What is the density of silver in SI unit?
Question 6 :
The volume of a 500 g sealed packet is $350\ cm^3$. Will the packet float or sink in water if the density of water is $1\ g \ cm^{–3}$?
Question 8 :
A ball is thrown vertically upwards with a velocity of 49m/s. Calculate the total time it takes to return to the surface of the Earth.
Question 9 :
A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 $m/s^2$,What is the net displacement and the total distance covered by the stone?
Question 11 :
A ball thrown up vertically returns to the thrower after 6 s. Find the maximum height it reaches.
Question 12 :
What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is $6 \times 10^{24}$ kg and radius of the earth is $6.4 \times 10^6$ m.)
Question 14 :
Two objects of masses $ m_1$ and $m_2$ having the same size are dropped simultaneously from heights $ h_1$ and $h_2$ respectively. What will the ratio of time they would take in reaching the ground be if both of them are hollow, size remaining the same in each case?
Question 15 :
An object is thrown vertically upwards and rises to a height of 10 m.What is the time taken by the object to reach the highest point?
Question 16 :
How does the force of attraction between the two bodies depend upon distance between them?
Question 17 :
Why is the weight of an object on the moon$\frac{1}{6}th$ its weight on the earth?
Question 18 :
A ball thrown up vertically returns to the thrower after 6 s. Find the velocity with which it was thrown up.
Question 19 :
A ball thrown up vertically returns to the thrower after 6 s.What is its position after 4 s?
Question 20 :
Two objects of different masses falling freely near the surface of moon would:
