442hz the should be the correct answer
Answer:
98 N
Explanation:
Given that The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g=9.8 m/s2). Of an object’s mass is m=10. kg,
The parameters to be considered are
Mass m = 10 kg
Acceleration due to gravity = 9.8m/s^2
Weight W = mg
substitute mass m and acceleration due to gravity g into the formula above.
Weight = 10 × 9.8
Weight = 98 N
Therefore, the weight of the body or object is 98 N
Answer
given,
radius of merry - go - round = 4 m
mass of the disk = 120 kg
speed of the merry- go-round = 0 rad/s
speed = 2 m/s
mass of student = 60 kg
initial angular momentum of the system
final angular momentum of the system
from conservation of angular momentum
now,
change in kinetic energy of the system
initially the merry-go-round was on rest KE_i = 0
![\Delta KE =120 + 480 \times \dfrac{4}{16}](https://tex.z-dn.net/?f=%5CDelta%20KE%20%3D120%20%2B%20480%20%5Ctimes%20%5Cdfrac%7B4%7D%7B16%7D)
![\Delta KE = 240\ J](https://tex.z-dn.net/?f=%5CDelta%20KE%20%3D%20240%5C%20J)