Which statement describes a vector?

It has both direction and magnitude

It has magnitude but no direction

It has direction but no magnitude

It has constant magnitude but no direction

Which situation experiences forces in equilibrium?

a ship floating above the sea surface

a car moving down a hill with increasing velocity

To increase the size of the moment, we can...

increase the distance from the pivot

decrease the distance from the pivot

Any bar or a rod that's set up to tilt on a fulcrum

Any bar or a rod that's set up to tilt

Any bar that's attached to a pulley

When discussing simple machines, what is effort?

the force you apply to move an object

what the simple machine is lifting

the point where the lever pivots

What happens if you decrease the distance between the fulcrum and the load?

You can use less force to move the load

You have to decrease the length of the lever

You can use more force to move the load

You have to increase the height of the fulcrum

What is the centre of mass ?

it is a single point at which the object can balance.

The mass is distributed equally around it.

the centre of gravity of the object

Where will be the centre of mass of a uniform rod lies ?

At its centre of its cross sectional area

Where do you hang the plumb line when determining the Centre of mass?

From the point where you are suspending the object

It doesn't matter, because it always goes through the CG

Do all objects have a centre of gravity?

Yes all objects have a centre of gravity

No objects have a centre of gravity

Only some objects have a centre of gravity

Only very heavy objects have a centre of gravity

Diagram shows a stationary trolley (in equilibrium) on an inclined plane. What can we say about the magnitude of the force, F ?

It is equal to the component of the weight, W, that is parallel to the slope.

It is greater than the weight, W

It is equal to the component of the weight, W, that is perpendicular to the slope.

FINAL QUESTION: TAKE YOUR TIME. REMEMBER A DRAWING WILL HELP! A Force F is resolved into two components, F h and F v at right angles to each other as in the diagram above. Which statement below is NOT true?

F h and F v have sizes that when added together give a total equal to the size of F.

Decreasing the angle θ will increase the size of F h

Increasing the angle θ will increase the size of Fv

F h and F v have sizes that when added together give a total greater than the size of F.

P8 Forces in balance

Quiz

•

Physics

•

9th - 11th Grade

•

Practice Problem

•

Medium

•

CCSS.HSN.VM.A.1, NGSS.HS-PS2-1, NGSS.MS-PS2-2

+1

Standards-aligned

Sarah Revell

Used 18+ times

FREE Resource

38 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the unit for force?

Joules (J)

seconds (s)

Newtons (N)

meters (m)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How will this object move?

The object will move to the left, as the forces are balanced.

The object will move to the right, as the forces are unbalanced.

The object will move to the left, as the forces are unbalanced.

The object will move to the right, as the forces are balanced.

Which of the following is an example of an unbalanced force?

What is the sum of all forces acting on an object?

Resultant Force

Balanced Force

Unbalanced Force

Applied Force

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A quantity that has both magnitude and direction is called a scalar quantity.

True

False

Which symbol is used to show vector quantities?

Circle

Line

Arrow

Triangle

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

which of the following is a vector?

velocity

distance

position

speed

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P8 Forces in balance

38 questions

What is the unit for force?

How will this object move?

Which of the following is an example of an unbalanced force?

What is the sum of all forces acting on an object?

A quantity that has both magnitude and direction is called a scalar quantity.

Which symbol is used to show vector quantities?

which of the following is a vector?

Which of the following quantities are vectors?

Which of these is not a vector quantity?

Which statement describes a vector?

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