Science / Year 7 / Science Understanding / Physical sciences

View on Australian Curriculum website Australian Curriculum, Assessment and Reporting Authority
Curriculum content descriptions

Change to an object’s motion is caused by unbalanced forces, including Earth’s gravitational attraction, acting on the object (ACSSU117)

Elaborations
  • investigating the effects of applying different forces to familiar objects
  • investigating common situations where forces are balanced, such as stationary objects, and unbalanced, such as falling objects
  • investigating a simple machine such as lever or pulley system
  • exploring how gravity affects objects on the surface of Earth
  • considering how gravity keeps planets in orbit around the sun
General capabilities
  • Literacy Literacy
ScOT terms

Motion

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72 direct matches to ACSSU117

Moving Image

The physics of a slinky drop

  • TLF-IDM020143

Imagine holding a slinky by the top end, with the bottom end dangling in mid-air. What do you think would happen when you let it go? Explore the physics of two equal and opposing forces working on an object in this awesome experiment!

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Tablet friendly (Interactive resource)

Wild ride: get a grip

  • TLF-IDL477

Investigate the role of friction in performance of bicycle tyres. Test how the type of tread affects grip and speed. Choose tyres best suited to track and weather conditions in a time trial. This learning object is one in a series of four objects.

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Moving Image

Do heavier things fall faster?

  • TLF-IDM015553

Will a medicine ball or a basketball hit the ground first when dropped at the same time from the same height? In this clip, Catalyst's Dr Derek Muller investigates what influences the speed at which objects fall. Derek challenges some people in a market to make a prediction and explain their thinking, before he finally ...

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Interactive resource

Pulleys

  • TLF-IDL1198

Help warehouse workers lift crates by using a rope and pulleys. Explore relationships between mass, force, distance and work. Notice that pulleys change the direction of a force and make it easier to lift loads. Solve a range of lifting problems by using combinations of worker numbers (force) and pulley numbers. This learning ...

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Tablet friendly (Interactive resource)

Give me a brake

  • TLF-IDL52

Investigate braking efficiency of cars and trucks by testing stopping distances under controlled conditions. Test effects of vehicle type, tyres, road surface and weather conditions. Choose driving speed, then apply brakes and compare stopping distances. Estimate distances from target markers. Answer questions about antilock ...

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Interactive Resource

Useful Friction

  • TLF-IDM016524

Students use this resource consisting of six slides with diagrams, written explanation and voice-over to understand how friction is needed in movement and braking. The fact that friction produces heat and causes wear is also mentioned. There is a two-question quiz and a summary slide.

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Teacher resource

Backyard Science: forces

  • TLF-IDS8362

This resource, including student videos, provide opportunities for students to identify types of forces, determine whether forces are balanced or unbalanced and compare water and air resistance. They will conduct an investigation into the relationship between friction and different types of surfaces. Students will design, ...

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Tablet friendly (Interactive resource)

It's a drag

  • TLF-IDL51

Investigate the braking efficiency of cars and trucks. Test stopping distances under controlled conditions. Compare effects of vehicle type, tyres, road surface and weather conditions. Choose driving speed, then apply brakes and compare stopping distances. Answer questions about friction, tyres and driver fatigue. This ...

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Interactive resource

Wild ride: on a roll

  • TLF-IDL479

Investigate the role of physical forces in how bicycle wheels work. Test how wheel size, tyre pressure, tread and load affect rolling resistance. Then choose wheels best suited to track conditions in a time trial. This learning object is one in a series of four objects.

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Interactive Resource

Friction

  • TLF-IDM016534

Students use this resource consisting of eleven slides with diagrams, written explanation and voice-over to understand how frictional forces, including air resistance, can affect the motion of an object. There is a two-question quiz and a summary slide.

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Interactive Resource

Gravity and the Solar System

  • TLF-IDM016459

Students use this resource consisting of seven slides with diagrams, written explanation and voice-over to understand how the movement of planets around the sun is related to gravitational forces. There is a two-question quiz and a summary slide.

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Interactive resource

Pulleys: change the force

  • TLF-IDL1199

Help warehouse workers lift crates using a rope and pulleys. Explore relationships between mass, force, distance and work. Notice that pulleys change the direction of a force and make it easier to lift loads. Identify the number of workers needed to lift a range of weights. This learning object is one of three objects in ...

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Moving Image

Friction: friend or foe?

  • TLF-IDM017940

What part does the force of friction play in our everyday lives? Friction can be an advantage (friend) or a problem (foe). Join interviewer Doug Traction and professors Static, Slide, Rolling and Fluid at the National Tribology Research Centre as they have forceful fun investigating friction. This video won a prize in the ...

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Interactive resource

Wild ride: in top gear

  • TLF-IDL481

Investigate how gears work and why you need them to ride a bicycle efficiently. Test how cog size affects speed and energy efficiency. Then choose gears best suited to track conditions in a time trial. This learning object is one in a series of four objects.

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Moving Image

Effects of g-force on the human body

  • TLF-IDM015554

Peter Rowsthorn visits the Australian International Air Show to answer the question, 'What effect does g-force have on the human body?' Join Pete in the cockpit of a light plane for some aerobatics with pilot David Pilkington. G-force expert Dr David Newman explains the science as Pete endures up to 6 g in the aircraft.

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Interactive Resource

Gravity

  • TLF-IDM016722

Students use this resource consisting of four slides with diagrams, written explanation and voice-over to understand that gravity is a force of attraction which acts on Earth towards the centre of the planet, and that the size of the force of gravity depends on the mass of each object and the distance between them. There ...

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Interactive Resource

Sites2See: Surf safety

  • TLF-IDM015335

A webpage about surfing safety, dangerous waves and rips, and the history and science of surfing. A 'For Kids' section provides games and quizzes for young swimmers and surfers.

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Interactive Resource

experiMENTALS: Magic rocking candle

  • TLF-IDM016610

This resource contains a materials and instruction list and brief explanation for students about the process of burning both ends of a balancing candle. This activity is most likely to be done as a teacher demonstration for safety and classroom management reasons, particularly at primary school level.

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Interactive resource

EagleCat: gears

  • TLF-IDL10085

Explore the relationships between cog size, speed, direction of motion and gear ratios. Change the settings on four interlocking cogs. For example, change the number of teeth on a green cog and look at its effect on an interlocking red cog. Answer questions about gear ratios. Look at different cog combinations to answer ...

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Interactive Resource

Energy skate park: basics

  • TLF-IDM012215

This is an interactive teaching and learning resource that years 7 to 10 secondary school students can use to simulate the motion of a skateboarder descending and ascending on a variety of tracks. Height, speed and energy conservation are visually displayed. The skater's mass and starting height, as well as the drag he ...

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