Forces in action

Question 1

upthrust

Answer 1

a force on an object due to the difference in pressure when immersed in a fluid

Question 2

Terminal velocity

Answer 2

velocity at when drag equals to accelerating force, resulting in zero resultant force and zero acceleration.

Question 3

equilibrium

Answer 3

when all the forces acting on the object are on the same plane are balanced, resulting on a net-zero resultant force.

Question 4

moment

Answer 4

the product of a force and perpendicular distance of its line of action from point or axis

Question 5

couples

Answer 5

when two equal, anti-parallel forces act to produce a rotation

Question 6

center of mass

Answer 6

a single point on an object at which all fo the mass of the object can be assumed to be situated

Question 7

center of gravity

Answer 7

a single point on an object at which the entire weight of the object can be assumed to be situated

Question 8

Archimedes principle

Answer 8

upwards buoyant force exerted on an object immersed in a fluid is equal to the weight of the fluid displaced2