a.State the name of the object that has more inertia :
(i) A rubber ball and a stone of the same size.
(ii) An empty box and another similar box filled with clothes.
b.Give reasons for the following :
(i) Luggage placed on the roof of a car or bus is tied with rope.
(ii) When a branch of a tree is shaken vigorously, some of the leaves drop down.
CBSE Class IX Science SA 2 (3 Marks)
Answers
(a) (i) Stone. (ii) Box filled with clothes.
(i) Because this is done to prevent luggage from falling when the vehicle is suddenly stopped or started because due to inertia the luggage will experience a je-rk in a direction opposite to the direction of vehicle.
(ii) Because on shaking, branch comes to state of motion and leaves which are in state of rest experience a je-rk due to which these get detached and fall down.A.State the name of the object that has more inertia :
(i) A rubber ball and a stone of the same size.
(ii) An empty box and another similar box filled with clothes.
b.Give reasons for the following :
(i) Luggage placed on the roof of a car or bus is tied with rope.
(ii) When a branch of a tree is shaken vigorously, some of the leaves drop down.
(a) (i) Stone. (ii) Box filled with clothes.
(i) Because this is done to prevent luggage from falling
when the vehicle is suddenly stopped or started because due to inertia the luggage will experience a je-rk in a
direction opposite to the direction
of vehicle.
(ii) Because on shaking, branch comes to state of motion and leaves which are in state of rest experience a je-rk due to which these get detached and fall down.