Answer
given,
mass of people = 65 kg
number of people =
diameter of the merry-go-round = 4.2 m
radius = 2.1 m
angular velocity = 0.8 rad/s
moment of inertia = 1760 kg m²
Using the law of conservation of angular momentum, we have
L₁= L₂
I₁ω₁ =I₂ω₂
I₁ω₁= ( I₁+ 4 m r²)ω²
( 1760 x 0.8) = ( 1760 + 4 x 65 x 2.12)ω²
1408 = 2311.2 ω²
ω² = 0.609
ω = 0.781 rad/s
b) If the people jump of the merry-go-round radially, they exert no torque.
hence, it will not change the angular momentum of the merry-go-round. It will continue to move with the same ω .
<h2>Answer:</h2>
The feature of an object affects its weight are given below
- mass of the object
- location of the object
- how much force Earth exerts on the object
<h2>Explanation:</h2>
Weight of the body is equal to the product of gravity and the mass of it so weight is dependent upon mass. The more the mass, the more is the weight. In the same way the location of the object differs if the location is far from the earth. Similarly gravity is the force with which earth attracts everything towards its center therefore we can say that if the object moves away from the earth center the weight decreases eventually..
Answer:
468750 J
Explanation:
Kinetic energy = (1/2) (mass)(velocity)^2
W = m * g
W = 80.5 kg * 3.71 m/s^2
W = 298.66 Newton’s
