Question

free fall of an object in vacuum is a case of motion with...
A) uniform velocity
B) uniform acceleration
C) variable acceleration
D) constant momentum

Answer 1

Answer:

uniform accelaration.

Explanation:

when a body is under free fall in vacuum it is purely under the influence of accelaration due to gravity (9.8 m/s^2)

Answer 2

Free fall of an object in vacuum is a case of motion with uniform acceleration.

B) uniform acceleration is the correct answer.

Explanation:

Object will not be having uniform velocity as there will be acceleration due to gravity acting only on object when it is falling.

Object will be having uniform acceleration as the object is in vacuum and only acceleration due to gravity is acting and no other force.

Object will not be having variable acceleration as no other force is acting on object in vacuum other than acceleration due to gravity.

Object will not be having  constant momentum as we know,

Momentum = Mass * Velocity

and momentum is directly proportional to velocity so, as velocity is not constant then momentum will also be not constant.