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Questions and Answers
What unit is used to measure force?
Weight is measured in kilograms.
False
What is the formula to calculate weight?
weight = mass x g
On Earth, 1 kilogram of matter weighs _____ N.
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Match the following types of forces with their definitions:
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If an object has a mass of 50kg, what is its weight on Earth?
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What is the gravitational field strength on Earth?
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The force exerted by a jet engine can be measured as _____ N.
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Study Notes
Forces
- A force is a push or pull and is measured in newtons (N).
- A spring balance (newtonmeter) can be used to measure small forces.
- The greater the force, the further the spring is stretched.
Types of Forces
- Tension: The force in a stretched material.
- Weight: The downward pull of gravity.
- Friction: The force that resists motion between surfaces in contact.
- Air Resistance: A type of friction caused by air.
Gravitational Force
- The Earth exerts a downward pull on objects.
- This pull is called a gravitational force.
- All masses attract each other.
- The stronger the mass, the stronger the force.
- The closer the masses, the stronger the force.
Weight and Gravitational Field Strength
- Weight is the gravitational force from the Earth.
- Weight is measured in newtons (N).
- On Earth, each kilogram (kg) of matter weighs 10 N.
- The gravitational field strength on Earth is 10 N/kg, represented by g.
- The formula to calculate weight is: weight = mass x g
- Where g is 10 N/kg on Earth.
- For example, a person with a mass of 50kg weighs 500N (50kg x 10 N/kg).
Question 3
- The diagram should show a climber swinging on a rope, with three forces labelled:
- Tension: The upward force from the rope.
- Weight: The downward force due to gravity.
- Air Resistance: The force opposing the climber's movement through the air.
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Description
Test your knowledge on the fundamental concepts of forces, including tension, weight, and gravitational forces. This quiz covers how forces are measured and their effects on motion. Dive into the world of physics and understand the intricacies of forces!
