Question Text
Question 1 :
A ball thrown up vertically returns to the thrower after 6 s.What is the maximum height it reaches?
Question 3 :
A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.
Question 4 :
A ball is thrown vertically upwards with a velocity of 49 m/s.What is the total time it takes to return to the surface of the earth?
Question 5 :
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 6 :
A ball is thrown vertically upwards with a velocity of 49 m/s.What is the maximum height to which it rises?
Question 7 :
What happens to the force between two objects, if the distance between the objects is doubled?
Question 8 :
The mass of the earth is $6 \times 10^{24}$ kg and that of the moon is $7.4 \times 10^{22}]$ kg. If the distance between the earth and the moon is $3.84 \times 10^5$ km, What is the force exerted by the earth on the moon. (Take $G = 6.7 \times 10^{–11}\ N\ m^2\ kg^{-2}$)
Question 9 :
A ball thrown up vertically returns to the thrower after 6 s. Find its position after 4s.
Question 10 :
What is the force of gravitation between the earth and the Sun, given that the mass of the$ earth = 6\times10^{24}$ kg and of the $Sun = 2\times10^{30}$ kg. The average distance between the two is $1.5\times10^{11}$ m.