M1 (3.0 kg) is connected to M2 (2.0)) with a rigid light string. Both sits on a leveled ground of uk=0.25 with block M3 (1.0 kg) sits on top of M2. When a force F 25 N pulls on M1 forward with an angle 30.0 degrees with respect to the ground, all three blocks move at the same acceleration. what is the normal force and friction on M1 ? what is the acceleration of the system (M1+M2+M3)? use work and Kinetic theory to find the speed of the system at the time all blocks have traveled a displacement of 5.0 m

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!