Lesson 3.03i
3.03i Tension and thrust Quiz: OCR Maths, Unit 18
20 questions
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Lesson 3.03i, Tension and thrust: 20 multiple choice questions for the OCR Maths (H240), Unit 18: Forces and Newton's Laws, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
What assumption allows two rigidly connected moving objects to be modelled as a single particle?
- Zero total mass
- Constant velocity
- Zero acceleration
- No relative motion
-
What force acts perpendicular to a surface when an object rests upon it?
- Tension
- Thrust
- Normal reaction
- Friction
-
What happens physically to an object on a surface when the normal reaction force becomes zero?
- Mass becomes zero
- Contact is lost
- Friction increases
- Acceleration stops
-
On a horizontal plane, what is the magnitude of normal reaction for a mass of 5 kg?
- 49 N
- 5 N
- 9.8 N
- 50 N
-
What property of a surface is assumed when friction between contacting bodies is ignored?
- Inextensible
- Smooth
- Light
- Rough
-
What condition must be met for a particle to be in mechanical equilibrium?
- Zero resultant force
- Zero mass
- Constant acceleration
- Zero velocity
-
What property of a string ensures that connected particles share the same magnitude of acceleration?
- Rigid
- Smooth
- Inextensible
- Light
-
What modelling assumption means the mass of a connecting string can be neglected?
- Light
- Inextensible
- Thin
- Smooth
-
What force is transmitted through a pulled, taut, flexible string?
- Friction
- Tension
- Thrust
- Normal reaction
-
What force acts in a rigid tow-bar when a pushing force is applied through it?
- Tension
- Thrust
- Weight
- Friction
-
What is the primary limitation of modelling a contact surface as perfectly smooth?
- Ignores mass
- Ignores gravity
- Ignores weight
- Ignores friction
-
What effect does a smooth fixed pulley have on the tension in a light inextensible string?
- Tension reaches zero
- Tension stays equal
- Tension halves
- Tension doubles
-
An engine pulls a carriage of mass 1000 kg with acceleration 2 m/s². What net force causes this acceleration?
- 1000 N
- 500 N
- 9800 N
- 2000 N
-
If two connected particles move vertically, what direction does tension act on the lower particle?
- Horizontally left
- Horizontally right
- Vertically downwards
- Vertically upwards
-
A box of mass m sits at rest on a horizontal surface. What is the normal reaction force?
- m
- mg
- g
- 0
-
An engine of mass 2000 kg pulls a 1000 kg carriage. What total mass is used to find system acceleration?
- 10000 kg
- 3000 kg
- 1000 kg
- 2000 kg
-
What is the angle between the normal reaction force and an inclined contact surface?
- 45 degrees
- 180 degrees
- 90 degrees
- 0 degrees
-
A light inextensible string passes over a smooth pulley connecting two equal masses. What is the system acceleration?
- 4.9 m/s²
- 9.8 m/s²
- 19.6 m/s²
- 0 m/s²
-
What force acts on a smooth pulley peg from a string under tension on both sides?
- Tension T only
- Mass of pulley
- Zero force
- Resultant of tensions
-
For a slope at angle θ, what weight component acts parallel down the inclined plane?
- mg
- mg sin(θ)
- mg tan(θ)
- mg cos(θ)
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