Lesson M8.6.1
M8.6.1 Friction and the F <= mu R model Quiz: Pearson Edexcel Maths, Unit 18
20 questions
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Lesson M8.6.1, Friction and the F <= mu R model: 20 multiple choice questions for the Pearson Edexcel Maths (9MA0), Unit 18: Forces and Newton's laws, written with Revision Ninja.
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The 20 questions
-
What symbol represents the coefficient of friction between two surfaces?
- mu
- rho
- lambda
- theta
-
Which inequality correctly models the magnitude of frictional force F?
- F >= mu R
- F < R
- F = mu R
- F <= mu R
-
What does R represent in the standard friction model?
- Resultant force
- Normal reaction
- Resistance force
- Restitution
-
When friction reaches its maximum possible value, the object is described as what?
- Limiting equilibrium
- Smooth contact
- Static balance
- Terminal velocity
-
What is the value of the coefficient of friction for a perfectly smooth surface?
- One
- Negative one
- Infinite
- Zero
-
In which direction does the frictional force always act relative to the contact surface?
- Parallel
- At forty-five degrees
- Perpendicular
- Vertically upwards
-
What force always acts vertically downwards on an object resting on a horizontal table?
- Tension
- Thrust
- Normal reaction
- Weight
-
What is the unit of the coefficient of friction mu?
- Kilograms
- Metres per second
- No unit
- Newtons
-
A 10 N block rests on a rough table with mu = 0.4. What is the normal reaction?
- 4 N
- 0.04 N
- 10 N
- 25 N
-
A 10 N block rests on a rough table with mu = 0.4. What is the maximum friction?
- 10 N
- 4 N
- 0.4 N
- 40 N
-
A normal reaction is 20 N and friction is 5 N. What is the minimum coefficient of friction?
- 0.25
- 0.2
- 4.0
- 100
-
Maximum friction is 12 N and mu is 0.3. What is the normal reaction R?
- 0.025 N
- 360 N
- 40 N
- 3.6 N
-
A block experiences a normal reaction of 50 N and mu = 0.2. What is the actual friction if pulled with 8 N?
- 8 N
- 10 N
- 50 N
- 0.25 N
-
A block experiences a normal reaction of 50 N and mu = 0.2. What is the actual friction if pulled with 15 N?
- 50 N
- 15 N
- 3 N
- 10 N
-
An object on a horizontal plane has mass 3 kg. Taking g = 9.8, what is R?
- 0.3 N
- 3.0 N
- 29.4 N
- 9.8 N
-
What is the typical range of numerical values for the coefficient of friction between dry surfaces?
- Greater than 1
- Negative
- Between 0 and 1
- Between -1 and 1
-
If an applied horizontal force is less than maximum friction, what is the object's state?
- Stationary
- Moving at constant speed
- Accelerating
- Decelerating
-
A box of weight W sits on a horizontal floor. An upward vertical force P is applied. What is R?
- W + P
- W - P
- W
- P - W
-
A box of weight W sits on a horizontal floor. A downward vertical force P is applied. What is R?
- W + P
- P - W
- W
- W - P
-
What physical property of the interacting surfaces determines the value of mu?
- Mass
- Velocity
- Roughness
- Area
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