Answer:
Explanation:
Given
mass of objects m is 2.8 kg
objects is away from axis of rotation
angular velocity
moment of inertia of stool and student is
New distance of objects
conserving Angular momentum
Initial Angular momentum
For Second case
Answer:
Positively charged particles in atoms are D. Protons
Explanation:
Negative = Electrons
Neutral = Neutron
Positive = Proton
Answer:
the kinetic energy lost due to friction is 22.5 J
Explanation:
Given;
mass of the block, m = 0.2 kg
initial velocity of the block, u = 25 m/s
final velocity of the block, v = 20 m/s
The kinetic energy lost due to friction is calculated as;
Therefore, the kinetic energy lost due to friction is 22.5 J