The motion of ______ body is an example of uniformly accelerated motion.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. freely falling
The motion of a freely falling body moves under the acceleration due to gravity and therefore, its acceleration is constant. So, it is a uniformly accelerated motion.Therefore,acceleration produced in a freely falling body does not depend on the mass of the body.
Gravity of the Earth attracts every object towards its centre. When an object is released from a height, it falls towards the surface of the Earth under the influence of gravitational force. The motion of the object is said to have free fall.
- Acceleration due to gravity-When an object falls towards the ground from a height, then its velocity changes during the fall. This changing velocity produces acceleration in the object. This acceleration is known as acceleration due to gravity (g). Its value is given by 9.8 m/s2.
There are two important motion characteristics that are true of free-falling objects:
- Free-falling objects do not encounter air resistance.
- All free-falling objects (on Earth) accelerate downwards at a rate of 9.8 m/s/s (often approximated as 10 m/s/s for back-of-the-envelope calculations)