Motion

Question 1

Newton’s first law

Answer 1

An object will stay at rest/constant velocity if forces are balanced or no resultant force.
If s resultant force acts, the object will accelerate in the direction of the force

Question 2

Newton’s second law

Answer 2

acceleration is directly proportional to force appleid

F=ma

Question 3

Newton’s third law

Answer 3

If object A exerts a force on object B, object B will exert an equal and opposite force on object A

Question 4

Work done equation

Answer 4

Work done = force x distance in direction fo force

Question 5

Moment

Answer 5

force * perpendicular distance from line of action of the force to the point

Question 6

Centre of gravity

Answer 6

point at which force of gravity or weight appears to act

Question 7

Finding the center of gravity

Answer 7

For regular/uniform objects find the center

For irregular objects: hang object and plum line with a clamp over stand
Wait for object to stabilize and draw a line aligned with the plum line over object
Rotate object and repeat
the point of intersection of the lines is where the centre of gravity is