Question Text
Question 1 :
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 2 :
A ball thrown up vertically returns to the thrower after 6 s. Find the velocity with which it was thrown up.
Question 3 :
An object is thrown vertically upwards and rises to a height of 10 m.What is the velocity with which the object was thrown upwards?
Question 4 :
The weight of an object at the centre of the earth of radius R is ______.
Question 5 :
An apple falls from a tree because of gravitational attraction between the earth and apple. If $F_1$ is the magnitude of force exerted by the earth on the apple and $F_2$ is the magnitude of force exerted by apple on earth, then:
Question 6 :
A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone :
Question 7 :
Two objects of masses $m_1$ and $m_2$ having the same size are dropped simultaneously from heights $ h_1$ and $h_2 $respectively. What will the ratio of time they would take in reaching the ground be if one of the objects is hollow and the other one is solid ?
Question 9 :
Mass of an object is 10 kg.What is its weight on the earth?
Question 10 :
Why is the weight of an object on the moon$\frac{1}{6}th$ its weight on the earth?