Multiple choice quiz of 20 questions. Try it as often as you like. You will get a different set of questions each time.

- The fixed point about which a lever rotates is called a
- fulcrum
- moment
- turning effect
- force

- The photo shows a hammer used by carpenters to drive nails into wood.

Which point on the hammer must be gripped in order that the carpenter uses the least force in driving the nail?- W
- X
- Y
- Z

- The diagram shows an old-fashioned balance used to measure weights.

Where is the fulcrum located?- Z
- X
- W
- Y

- If a force of 30 N is exerted on the spanner shown at point X, what moment is applied to the bolt?
- 600 N cm
- 1.5 N cm
- 50 N cm
- 10 N cm

- In what way may the turning effect of a force be increased?
- By increasing the perpendicular distance between the force and the fulcrum.
- By decreasing the perpendicular distance between the force and the fulcrum.
- By reducing the applied force.
- By lubricating the fulcrum with oil or grease.

- Which one of the following items is NOT a lever?
- Which one of the following items is a lever?
- A rigid body free to turn about a fixed point is called a
- lever
- fulcrum
- moment
- force

- The diagram shows a balanced meter-stick.

What is the value of the weight placed at the 10 cm mark?- 1.5 N
- 16 N
- 6 N
- 40 N

- The diagram shows a metre-stick balanced at equilibrium.

At what position on the metre-stick is the 3 N placed?- 60 cm
- 56.6 cn
- 10 cm
- 6.6 cm

- The metre-stick shown is balanced at equilibrium.

At what position on the metre-stick is the 2 N weight placed?- 30 cm
- 20 cm
- 10 cm
- 70 cm

- A stone is balanced on a metre-stick as shown. What is the weight of this stone?
- 0.67 N
- 8.67 N
- 2 N
- 2.89 N

- The metre-stick shown is balanced at equilibrium.

Where is its fulcrum?- Y
- X
- Z
- W

- The point through which the weight of a body appears to act is called its
- centre of gravity
- fulcrum
- pivot
- handle

- A glass of wine was tilted as shown, but it did not topple over.

Where is its centre of gravity most likely to be?- C
- B
- D
- A

- A metre-stick is suspended at the 50 cm mark.

A 4 N weight is placed at the 20 cm mark as shown.

It is balanced by another weight at the 70 cm mark.

What is the value of the second weight?- 6 N
- 4 N
- 1.7 N
- 1.1 N

- The turning effect of a force depends upon
- the force and the perpendicular distance from the force to the fulcrum.
- the fulcrum and the force.
- the force and the centre of gravity that the force acts on.
- centre of gravity and the moment of the force.

- In which one of the following examples is the metre-stick NOT balanced?
- What weight must be added at the 80 cm mark in order to balance the metre-stick shown?
- 4 N
- 0 N
- 2 N
- 1.5 N

- In 1974, a French man, Philippe Petit performed a tightrope walk across the twin towers skyscrapers in New York. The photograph shows him during the 45 minute walk. Where in the photo would you expect to find his centre of gravity?
- B
- A
- C
- D

- A force is applied to a wrench as shown, and it produces a moment of 8 N m.

What is the value of this force?- 32 N
- 2 N
- 8.25 N
- 0.03125 N

- The weight of a body seems to act through a single point called the
- centre of gravity
- moment
- edge
- fulcrum

- there are three states of equilibrium. Which one of the following is NOT one of these states?
- Regular
- Stable
- Unstable
- Neutral

- The diagram shows a bunsen burner in three different positions. Which one of these positions is the most stable?
- Y
- X
- Z
- W

- Which one of the drinking glasses in the diagram is the least stable?
- Which one of the drinking glasses in the diagram is the most stable?
- Formula One racing cars need a high degree of stability when turning bends on the race track.

Which TWO of the following features of these racing cars contribute to this stability? - The picture shows an empty CD case.

At what point on the case must it be held so that it is in stable equilibrium?- X
- Either X or Y
- Z
- W

- The picture shows an empty CD case.

At what point on the case must it be held so that it is in the least stable state of equilibrium?- W
- X
- Z
- Y

- The photograph shows a crane on a building site.

When lifting a heavy load, the anti-clockwise moment is equal to the clockwise moment. Where on the crane is the load balanced.- W
- X
- Y
- Z

- The diagram show the apparatus used to find the centre of gravity of a thin piece of cardboard.

What are the parts labelled X and Y called?- X = cork, Y = weight
- X = cork, Y = clamp
- X = weight, Y = plumb-line
- X = plumb-line, Y = clamp

- In the photograph of the wheel-barrow shown, which labelled part is the fulcrum?
- W
- X
- Y
- Z

- The door handle is an application of a lever.

The labels and arrows show three points.

Which of the points A, B or C represent the fulcrum (turning point)?- A
- B
- C

- The door handle is an application of a lever.

The labels and arrows show three points.

Which of the points A, B or C represent the point where the smallest force will open the door lock.- C
- A
- B

- A uniform metre-stick, suspended at its mid-point is balanced as shown.

What is the force X?- 4 N
- 0.375 N
- 1.5 N
- 10 N

- The diagram shows a spanner and a nut.

Complete the sentences below by inserting the correct words from the lists below.

The further away from the fulcrum (turning point) you apply a _______________ the easier it is to turn a nut.

The use of a spanner to turn a nut is an everyday example of using a __________________.- force, lever
- force, friction
- lever, friction
- friction, lever

- The crowbar in the diagram acts as a lever and applies a turning force on the boulder (large rock).

Which of the three points, A, B or C, is the fulcrum (the point about which the turning force acts)?- C
- A
- B

- The crowbar in the diagram acts as a lever and applies a turning force on the boulder (large rock).

At which of the three points, A, B or C, will the least force be needed to move the boulder?- A
- B
- C

- Complete the sentence:

The turning effect of a force is called the .................. of the force.- moment
- equilibrium
- perpendicular distance
- lever

- The diagram shows a spanner being used.

What is the turning effect in newton metres?- 4 N m
- 400 N m
- 1 N m
- 100 N m

- The diagram shows a crane which is loading containers onto a ship.

What is the moment in newton metres?- 810,000 N m
- 810,000 N
- 2,500 N m
- 0.0004 N m

- If a spanner is 15 cm long, and a force of 10 N is applied using this spanner, what is the turning effect of the force in N m?
- 1,5 N m
- 150 N m
- 0.67 N m
- 66.67 N m

- The diagram shows a child's mobile. It hangs from the ceiling at a point P.

Where is the centre of gravity of the mobile most likely to be?- S
- P
- Q
- R

- The diagram shows two concrete mixers.

On each diagram, X marks the centre of gravity of the mixer and its contents.

If both mixers are drawn to the same scale, what two features make concrete mixer B more stable? - The diagram shows a toy T-Rex standing on its feet.

Where is the centre of gravity of this toy most likely to be found?- R
- P
- Q
- S