A person just
supports a mass
of 20 kg suspended from a rope.
What is the
resultant force acting
on the mass?
A 0N
B 10 N
C 20 N
D 200 N
B 10 N
C 20 N
D 200 N
Correct Answer: A (0 N)
Explanation:
The mass of the object = 20 kg
The weight of the object = mass x gravitational acceleration
= 20 kg x 10 m/s2 = 200 N
As the mass is not moving or falling down, the
person is also giving 200 N force to stop the object from falling down. And
from the second law of Newton we know that if there is a resultant force then
there will be acceleration. As there is no movement or acceleration of the
object, the resultant force is zero Newton.
