A 1.00 kg block sits on a 4.00 kg block which rests on a smooth table. A force of 12.0 N acts at an angle of 25.0° to the horizontal on block M1 and causes both blocks to move with the same acceleration. i. Draw the free body diagram for each block. [4 points]
Determine:
ii. the acceleration of each block, [2 points]
iii. the normal force exerted by the table on M1, and [2 points]
iv. the magnitude of the frictional force between the two blocks. [2 points]

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.