Answer:
Explanation:
The problem is based on conservation of angular momentum.
Moment of inertia of the disc = 1/2 m R² , m is mass of the disc and R is its radius.
= 1/2 x 98.1 x 1.51²
= 111.84 kg m²
Moment of inertia of disc + moment of inertia of bananas + monkey
= 1/2 x 98.1 x 1.51² + 9.29 x .45 x 1.51 + 20.3 x 1.51² ( moment of inertia of banana and monkey will be equal to mass x radial distance from axis² )
= 111.84 + 6.31 +46.28
= 164.43 kg m²
Now applying law of conservation of angular momentum
= I₁ ω₁ = I₂ω₂
111.84 x 1.69 = 164.43 x ω₂
ω₂ = 1.15 rad / s
Answer:
It's the duration between successive new moons. Also called a lunation or synodic month, it has a mean period of 29.53059 days (29 days 12 hours and 44 minutes).
Answer:
x represents an electron and y represents a proton and a neutron.
Explanation:
electrons are the smallest particle in an atom and protons and neutrons are a lot larger. thats why only protons and neutrons are weighed in atomic mass. electrons are too small to make a difference in the atom's weight.
Answer:
The correct option is that (She decreases her moment of inertia, thereby increasing her angular speed.)
Explanation:
When an object is in circular motion, the vector that describes it is known as angular momentum. Angular momentum is conserved or constant when an object is spinning in a closed system and no external torques are applied to it. An example of conservation of angular momentum is seen when a woman is sitting on a spinning piano stool with her arms extended. Her angular momentum is conserved because the net torque on her is negligibly small as the friction is exerted very close to the pivot point.
When she folds her arms,her rate of spin increases greatly decreasing her moment of inertia. The work she does to pull in her arms results in an increase in rotational kinetic energy( that is, increase in her angular speed). I hope this helps, thanks!
