Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.
Worksheet StudioPractice pack · Ages 7-9
Forces, friction & magnetism
Take your time. Show your thinking.
1. What happens to an object already moving at constant velocity in a straight line if the resultant force acting on it is zero: it continues at the same constant velocity, or it stops instantly?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
2. Why do swimmers and high-speed trains have streamlined shapes: to reduce water or air resistance (drag), or to increase mass?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
3. Does an astronaut’s mass in kilograms change when travelling from Earth to the Moon: No (mass stays the same) or Yes (mass becomes zero)?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
4. Where is the magnetic field around a bar magnet strongest: at the two poles, or in the exact middle?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
5. What happens when the north pole of one magnet is brought close to the north pole of another magnet: they repel or they attract?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
6. What is the standard SI unit used to measure force: the newton (N) or the kilogram (kg)?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
7. If two teams pull a rope in opposite directions with equal forces of 300 N each, are the forces balanced or unbalanced?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
8. Which group of three metallic elements are strongly ferromagnetic at room temperature: iron, nickel and cobalt, or gold, silver and copper?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
9. Which contact force acts between two surfaces sliding past each other and opposes motion: friction or magnetism?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
10. Is magnetic attraction a contact force or a non-contact force that can act across air or paper?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
11. Why do snowshoes and caterpillar tracks have a large surface area: to spread weight over a larger area and reduce pressure on soft ground, or to increase pressure?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
12. What happens when the north pole of one magnet is brought close to the south pole of another magnet: they attract or they repel?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
12 questions · Seed 47 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Forces, friction & magnetism
Answers and reasoning. Review before teaching.
1. What happens to an object already moving at constant velocity in a straight line if the resultant force acting on it is zero: it continues at the same constant velocity, or it stops instantly?
It continues at the same constant velocity
By Newton’s first law, zero resultant force means zero acceleration, so velocity remains constant.
2. Why do swimmers and high-speed trains have streamlined shapes: to reduce water or air resistance (drag), or to increase mass?
To reduce water or air resistance (drag)
A streamlined profile lets fluid flow smoothly around the body, minimising drag.
3. Does an astronaut’s mass in kilograms change when travelling from Earth to the Moon: No (mass stays the same) or Yes (mass becomes zero)?
No (mass stays the same)
Mass is the amount of matter in an object and stays constant; only weight (N) decreases in weaker gravity.
4. Where is the magnetic field around a bar magnet strongest: at the two poles, or in the exact middle?
At the two poles
Magnetic field lines are most concentrated at the north and south poles of a bar magnet.
5. What happens when the north pole of one magnet is brought close to the north pole of another magnet: they repel or they attract?
They repel
Like magnetic poles (north–north or south–south) repel each other.
6. What is the standard SI unit used to measure force: the newton (N) or the kilogram (kg)?
Newton (N)
Forces (including weight) are measured in newtons (N), whereas mass is measured in kilograms (kg).
7. If two teams pull a rope in opposite directions with equal forces of 300 N each, are the forces balanced or unbalanced?
Balanced
Equal and opposite forces give a resultant force of 0 N, so the forces are balanced.
8. Which group of three metallic elements are strongly ferromagnetic at room temperature: iron, nickel and cobalt, or gold, silver and copper?
Iron, nickel and cobalt
Iron, nickel and cobalt (and alloys like steel) are strongly attracted to magnets.
9. Which contact force acts between two surfaces sliding past each other and opposes motion: friction or magnetism?
Friction
Friction acts in the direction opposite to sliding motion and generates heat.
10. Is magnetic attraction a contact force or a non-contact force that can act across air or paper?
Non-contact force
Magnetism, gravity and electrostatic forces act through fields without requiring physical contact.
11. Why do snowshoes and caterpillar tracks have a large surface area: to spread weight over a larger area and reduce pressure on soft ground, or to increase pressure?
To spread weight over a larger area and reduce pressure on soft ground
Pressure = force ÷ area, so increasing area reduces pressure and prevents sinking.
12. What happens when the north pole of one magnet is brought close to the south pole of another magnet: they attract or they repel?
They attract
Opposite magnetic poles (north–south) attract each other.
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Forces, friction & magnetism
Take your time. Show your thinking.
1. What happens to an object already moving at constant velocity in a straight line if the resultant force acting on it is zero: it continues at the same constant velocity, or it stops instantly?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
2. Why do swimmers and high-speed trains have streamlined shapes: to reduce water or air resistance (drag), or to increase mass?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
3. Does an astronaut’s mass in kilograms change when travelling from Earth to the Moon: No (mass stays the same) or Yes (mass becomes zero)?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
4. Where is the magnetic field around a bar magnet strongest: at the two poles, or in the exact middle?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
5. What happens when the north pole of one magnet is brought close to the north pole of another magnet: they repel or they attract?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
6. What is the standard SI unit used to measure force: the newton (N) or the kilogram (kg)?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
7. If two teams pull a rope in opposite directions with equal forces of 300 N each, are the forces balanced or unbalanced?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
8. Which group of three metallic elements are strongly ferromagnetic at room temperature: iron, nickel and cobalt, or gold, silver and copper?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
9. Which contact force acts between two surfaces sliding past each other and opposes motion: friction or magnetism?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
10. Is magnetic attraction a contact force or a non-contact force that can act across air or paper?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
11. Why do snowshoes and caterpillar tracks have a large surface area: to spread weight over a larger area and reduce pressure on soft ground, or to increase pressure?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
12. What happens when the north pole of one magnet is brought close to the south pole of another magnet: they attract or they repel?
N [Magnet] S → Magnetic Pull / Friction · Opposite poles attract (N ↔ S)
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Forces, friction & magnetism
Answers and reasoning. Review before teaching.
1. What happens to an object already moving at constant velocity in a straight line if the resultant force acting on it is zero: it continues at the same constant velocity, or it stops instantly?
It continues at the same constant velocity
By Newton’s first law, zero resultant force means zero acceleration, so velocity remains constant.
2. Why do swimmers and high-speed trains have streamlined shapes: to reduce water or air resistance (drag), or to increase mass?
To reduce water or air resistance (drag)
A streamlined profile lets fluid flow smoothly around the body, minimising drag.
3. Does an astronaut’s mass in kilograms change when travelling from Earth to the Moon: No (mass stays the same) or Yes (mass becomes zero)?
No (mass stays the same)
Mass is the amount of matter in an object and stays constant; only weight (N) decreases in weaker gravity.
4. Where is the magnetic field around a bar magnet strongest: at the two poles, or in the exact middle?
At the two poles
Magnetic field lines are most concentrated at the north and south poles of a bar magnet.
5. What happens when the north pole of one magnet is brought close to the north pole of another magnet: they repel or they attract?
They repel
Like magnetic poles (north–north or south–south) repel each other.
6. What is the standard SI unit used to measure force: the newton (N) or the kilogram (kg)?
Newton (N)
Forces (including weight) are measured in newtons (N), whereas mass is measured in kilograms (kg).
7. If two teams pull a rope in opposite directions with equal forces of 300 N each, are the forces balanced or unbalanced?
Balanced
Equal and opposite forces give a resultant force of 0 N, so the forces are balanced.
8. Which group of three metallic elements are strongly ferromagnetic at room temperature: iron, nickel and cobalt, or gold, silver and copper?
Iron, nickel and cobalt
Iron, nickel and cobalt (and alloys like steel) are strongly attracted to magnets.
9. Which contact force acts between two surfaces sliding past each other and opposes motion: friction or magnetism?
Friction
Friction acts in the direction opposite to sliding motion and generates heat.
10. Is magnetic attraction a contact force or a non-contact force that can act across air or paper?
Non-contact force
Magnetism, gravity and electrostatic forces act through fields without requiring physical contact.
11. Why do snowshoes and caterpillar tracks have a large surface area: to spread weight over a larger area and reduce pressure on soft ground, or to increase pressure?
To spread weight over a larger area and reduce pressure on soft ground
Pressure = force ÷ area, so increasing area reduces pressure and prevents sinking.
12. What happens when the north pole of one magnet is brought close to the south pole of another magnet: they attract or they repel?
They attract
Opposite magnetic poles (north–south) attract each other.
12 questions · Seed 47 · Age guidance, not curriculum certification