Lesson T2.3.1
T2.3.1 Balanced forces and equilibrium Quiz: KS3 Physics, Unit 2
20 questions
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Lesson T2.3.1, Balanced forces and equilibrium: 20 multiple choice questions for the KS3 Physics (National Curriculum), Unit 2: Motion and forces, written with Revision Ninja.
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The 20 questions
-
What is the resultant force when two balanced forces act on an object?
- Doubled
- Infinite
- Zero
- Maximum
-
An object is in equilibrium. What is its resultant force?
- Unbalanced
- Zero
- Maximum
- Constant
-
A book experiences 10 N down and 10 N up from a table. What is the resultant force?
- 20 N
- 10 N
- 0 N
- 100 N
-
A mass hangs at rest from a spring. What upward force does the spring exert?
- Double the weight
- Half the weight
- Zero
- Equal to weight
-
What happens to an object's motion when balanced forces act on it?
- Accelerating
- Constant velocity
- Decelerating
- Stopping
-
An 8 N force east and a 3 N force west act on an object. What is the resultant force?
- 5 N west
- 11 N east
- 11 N west
- 5 N east
-
Two teams pull a rope with 300 N in opposite directions. What is the resultant force?
- 900 N
- 0 N
- 600 N
- 300 N
-
An object has 12 N upwards and 7 N downwards forces acting on it. What is the resultant?
- 5 N downwards
- 5 N upwards
- 19 N downwards
- 19 N upwards
-
A 2 N weight hangs at rest from a spring. What is the upward tension force?
- 4 N
- 20 N
- 2 N
- 0 N
-
What property of a force is represented by the length of its arrow in a diagram?
- Duration
- Direction
- Magnitude
- Type
-
What upward force holds a resting book on a table?
- Air resistance
- Gravitational force
- Magnetic force
- Normal contact force
-
A 15 N supported object has one upward force of 9 N. What is the other?
- 24 N
- 15 N
- 6 N
- 3 N
-
What must the resultant force be for an object moving at constant velocity?
- Maximum
- Decreasing
- Zero
- Increasing
-
A car's engine provides 800 N forward at steady speed. What is the resistance force?
- 0 N
- 1600 N backwards
- 400 N backwards
- 800 N backwards
-
A moving box is pushed with 40 N while friction is 40 N. What happens to its motion?
- Slowing down
- Speeding up
- Stopping immediately
- Constant velocity
-
An object has equal 20 N forces pulling left and right. What is its state?
- Accelerating right
- Decelerating
- Equilibrium
- Accelerating left
-
A 30 N force and 50 N force act in the same direction. What is the resultant force?
- 1500 N
- 80 N
- 40 N
- 20 N
-
A moving trolley has balanced 5 N forces acting on it. What happens?
- Constant speed
- Slows down
- Stops instantly
- Speeds up
-
Which phrase describes a pair of balanced forces?
- Unequal and opposite
- Unequal and same direction
- Equal and opposite
- Equal and same direction
-
A 4 N force pushes a crate right and a 4 N force pulls left. What is the resultant force?
- 4 N
- 16 N
- 8 N
- 0 N
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