Practical examination of grade 11 about verication of Newton's second law of motion

Verification of Newton's Second Law : F = ma. When the mass of an item is fixed, degree the relationships among outside pressure F and acceleration a. When the outside pressure F fixed, degree the connection among mass of the shifting item m and its acceleration a.

Explanation:

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

prndulum needs thread, weight clock to time swings