Review EST_Term 2 | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 21 Public

Chapter 1-4

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Mention 3 scalars quantity.

distance, speed, volume

Mention 3 vectors quantity.

weight, force, moment

What is the formula of weight? State the unit of weight.

Weight = mass x gravity (the unit is in Newton)

What is the formula of Force? State the unit of Force.

Force = mass x acceleration (the unit is in Newton)

What is the formula of spring constant? State the symbol and unit of spring constant.

k = F/x ; F = Force ; x = extension ; the unit of k = N/m = newton per meter

Calculate the resultant force acting on a ball and show the direction.

R = 20-12 = 8 N towards the right

What is the resultant force and the direction of the object?

R = 0 Newton ; Forces are balanced = the object is not moving

What is the resultant force and the direction of the object?

R = 7-5 = 2 N ; downward

A force that impedes motion/it acts in the opposite direction to motion is called ....

friction

In liquids and gases, friction is usually called .....

drag

The turning effect is measured by a physical quantity known as .....

moment of a force

What is the formula of moment of a force? State the unit.

moment = Force x perpendicular distance from the pivot ; unit = Nm

When there is no resultant force and no resultant moment, an object is in .....

equilibrium

Calculate the distance the child must sit from the pivot for the see-saw to be balanced.

the distance the child = (690 x 0.3) / 140 = 1.48 m or 1.50 m

Calculate the force in the right side.

F = (20 x 12) / 8 = 30 N

Calculate the force of the object that needed.

F = M / d ; F = 20 / 0.1 = 200 N