Question

Choose the correct or most appropriate answer in the following questions
1)Force of gravity alone acts in which of the following:
a)Train running on track
b) An apple falling from a tree
c)A bird flying
d)A ball rolling on the ground.
2)Wheels of vehicles get heated up on long running due to :
a)friction
b)increase in speed
c) increase in pressure in tyres
d)none of these.​

Answer 1

Answer:

Explanation:

1. option b an apple falling from tree is only  in which gravity act.

2. option a friction is correct option