Free fall of an object in vacuum is a case of motion with :
A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of :
(a) uniform motion (b) uniform acceleration
(c) no acceleration (d) uniform velocity
Which of the following cases is the object in free fall?
1. An object dropped from a certain height. 2. An object is thrown upward or an object thrown downwards from the top of a tower. 3. An object in the aircraft flying at constant speed. 4. An object in a car accelerating at 9.8 m/s2 on the road.