iGCSE physics unit 1 forces

The diagram shows a stopwatch, originally set at 00:00. When a car was first seen, the stop-start button was pressed. When the car passed the observer, the stopwatch showed 01:06. How long did the car take to reach the observer?

• 1.06 seconds

• 6 seconds

• 66 seconds

• 106 seconds

A girl uses a rule to measure the length of a metal rod. Because the end of the rule is damaged, she places one end of the rod at the 1 cm mark as shown. How long is the metal rod?

• 43 mm

• 46 mm

• 53 mm

• 56 mm

A stone falls freely from the top of a cliff into the sea. Air resistance may be ignored. Which graph shows how the acceleration of the stone varies with time as it falls?

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Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A child is standing on the platform of a station, watching the trains. A train travelling at 30 m / s takes 3 s to pass the child. What is the length of the train?

• 10m

• 30m

• 90m

• 270m

In which of these situations is no resultant force needed?

• a car changing direction

• a car moving in a straight line at a steady speed

• a car slowing down

• a car speeding up

The diagram shows a speed-time graph for a body moving with constant acceleration. What is represented by the shaded area under the graph

• Acceleration

• distance

• speed

• time

Tags

NGSS.MS-PS3-1

A tunnel has a length of 50 km. A car takes 20 min to travel between the two ends of the tunnel. What is the average speed of the car?

• 2.5 km/h

• 16.6km/h

• 150 km/h

• 1000 km/h

Which statement is correct?

• Mass is a force, measured in kilograms.

• Mass is a force, measured in newtons.

• Weight is a force, measured in kilograms

• Weight is a force, measured in newtons.

Tags

NGSS.MS-PS2-4

A spring is suspended from a stand. Loads are added and the extensions are measured.

Which graph shows the result of plotting extension against load?

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Which of the following is not necessary when using a measuring cylinder to measure the volume of a quantity of water?

• making sure that the measuring cylinder is vertical

• making sure that the measuring cylinder is vertical

• reading the bottom of the meniscus

• using the largest measuring cylinder possible

Answer explanation

You should always use the smallest measuring cylinder possible because it will have the smallest uncertainty - which means it will be the most precise.