If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is
2 answers:
Answer: Option (C) is the correct answer.
Explanation:
The relation between mass and weight is as follows.
Weight = mass × g
where, g= gravitational force =
For mass = 2m, calculate the weight as follows.
Weight = mass × g
= 2m × g
= 2mg
This means that when mass of object becomes 2m then its weight will also become 2mg.
Therefore, we can conclude that if the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is 2mg.
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The final momentum of the body is equal to 120 Kg.m/s.
<h3>What is momentum?</h3>Momentum can be described as the multiplication of the mass and velocity of an object. Momentum is a vector quantity as it carries magnitude and direction.
If m is an object's mass and v is its velocity then the object's momentum p is: . The S.I. unit of measurement of momentum is kg⋅m/s, which is equivalent to the N.s.
Given the initial momentum of the body = Pi = 20 Kg.m/s
The force acting on the body, Pf = 25 N
The time, Δt = 4-0 = 4s
The Force is equal to the change in momentum: F ×Δt = ΔP
25 × 4 = P - 20
100 = P - 20
P = 100 + 20 = 120 Kg.m/s
Therefore, the final momentum of a body is 120 Kg.m/s.
Learn more about momentum, here:
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