Answer:
D
Explanation:
From the information given:
The angular speed for the block 
Disk radius (r) = 0.2 m
The block Initial velocity is:

Change in the block's angular speed is:

However, on the disk, moment of inertIa is:

The time t = 10s
∴
Frictional torques by the wall on the disk is:

Finally, the frictional force is calculated as:


Answer:

Explanation:
Puck A's initial speed is
and move in a direction
after the collision.
#
since there's no external force on the system(
#The collision equation can be written as;

The kinetic energies before and after the collision are expressed as:


Let +x along A's initial direction and +y along A's final direction makes the angle 

#Substitute in
:


Hence, the the speed of puck A after the collision is 12.891 m/s
#. The velocity of A after the collision is;

Substitute
into
:

This is the velocity of puck B after the collision, it's speed is:

The velocity of puck B after the collision is 6.8544 m/s
c. The direction of puck B after the collision is:

Hence, the direction of B's velocity after the collision is 62°
Ionic Bonding: The formation of an Ionic bond is the result of the transfer of one or more electrons from a metal onto a non-metal. Covalent Bonding: Bonding between non-metals consists of two electrons shared between two atoms.
The continuious physical force per unit area that one region of a gas, liquid, or solid exerts on another.
PE = (weight) x (height)
= (mass) x (gravity) x (height)
= (410 kg) x (9.8 m/s²) x (12 m)
= (410 x 9.8 x 12) kg-m²/s²
= 48,210 joules (rounded)