Physical Quantities & Measurement Techniques (Cambridge O Level Physics)

I wish to roast a chicken for Sunday lunch. The chicken requires 1 hour and 20 minutes in the oven to be properly cooked.

The oven must be switched on 10 minutes before any food is put in, in order to pre-heat, and reach the correct temperature for cooking.

I wish the chicken to be ready at 4:30pm. At what time must I switch the oven on?

A particularly diligent student wants to measure the volume of some liquid for an experiment. She has two measuring cylinders available, a large 250 ml one and a small 50 ml one. The liquid will fit into either of the two measuring cylinders.

As expected, the liquid forms a meniscus where it touches the sides of either measuring cylinder.

Which cylinder should the student use to get the most accurate result, and from where should she measure the liquid level?

A geologist wants to measure the volume of a particularly interesting pebble she has found in a river.

She uses the apparatus shown below.

What is the volume of the pebble?

A scientist is trying to determine the volume of three identical pieces of a new material. She places them in a measuring cylinder, as shown in the diagram.

The first cylinder shows the level of water in the measuring cylinder before the pieces are added, and the second cylinder shows the measuring cylinder with the pieces of the new material inside.

What is the volume of each piece of the new material?

Which of the diagrams below correctly shows two forces , W and X with their resultant?

A small cylinder is rolled along a ruler and completes two full turns as shown in the diagram.

What is the circumference of the cylinder?

A list of various quantities is shown. 

acceleration 

displacement
 
force 

length
 
mass
 
velocity
 

How many of these quantities are vectors? 

Which diagram shows the vector addition of a 4.0N force and a 3.0N force?

A student determines the circumference of a football. 

Which instrument gives a reading that is the circumference of the football?

Three blocks are placed into three measuring cylinders. These are shown below.

Which row in the table shows the blocks in order of increasing volume?

	Smallest volume	→	Largest volume
A	X	Y	Z
B	Y	X	Z
C	Z	Y	X
D	Z	X	Y

A student is trying to see how quickly they can run 5.0 km on a standard 400 m running track.

They reason that, if they know how fast they can run one lap, they can assume they will run at the same speed for 5.0 km, and can calculate their predicted time.

They, correctly, reason that they will not be able to maintain their initial pace throughout the whole 5.0 km, so they decide to time lap 5.

The diagram shows the reading on the stopwatch at the beginning and the end of lap 5.

Calculate how long it should take the student to run 5.0 km.

An Olympic cyclist rides round a velodrome track 5 times.

The diagram below shows the reading on the stopwatch which was used to time the laps. Unfortunately, the person using the stopwatch started it a little early.

What is the average time to complete one lap of the velodrome?

A student uses a ruler to determine the circumference of a wooden dowel.

She puts a mark onto the dowel, then rolls it along the ruler three times, before reading the position on the ruler at which it stopped.

What is the circumference of the dowel?

Two forces act on an object at right angles to each other: a 6 N force and an 8 N force.

The diagrams below show the two forces.

Which diagram also shows the correct resultant force?