Lesson 3.03n
3.03n Forces on particles in two dimensions Quiz: OCR Maths, Unit 18
20 questions
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Lesson 3.03n, Forces on particles in two dimensions: 20 multiple choice questions for the OCR Maths (H240), Unit 18: Forces and Newton's Laws, written with Revision Ninja.
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The 20 questions
-
What physical property is assumed for a light string in mechanics problems?
- Zero length
- Zero mass
- Infinite strength
- Zero tension
-
What property do particles connected by an inextensible string share?
- Equal weight
- Equal acceleration
- Equal mass
- Zero tension
-
What is assumed about tension on either side of a smooth pulley?
- Double tension
- Variable tension
- Equal tension
- Zero tension
-
Which vector quantity always indicates the instantaneous direction of motion of a particle?
- Position vector
- Acceleration vector
- Velocity vector
- Resultant force vector
-
Which vector quantity always gives the direction of the resultant force on a particle?
- Velocity vector
- Displacement vector
- Acceleration vector
- Position vector
-
What is the magnitude of the resultant force acting on a particle in equilibrium?
- Equal to weight
- Zero
- 9.8 N
- Equal to mass
-
What is the horizontal component of a 10 N force acting at 60 degrees to horizontal?
- 2.5 N
- 5 N
- 10 N
- 8.66 N
-
What is the component of weight W perpendicular to an inclined plane at angle θ?
- W cos θ
- W tan θ
- W sin θ
- W / cos θ
-
What is the component of weight W acting down a smooth plane inclined at angle θ?
- W tan θ
- W cos θ
- W sin θ
- W sec θ
-
What is the resultant of force vectors (2i + 3j) N and (-5i + 4j) N?
- (3i - 1j) N
- (-3i - 1j) N
- (-3i + 7j) N
- (7i + 7j) N
-
A particle is in equilibrium under (3i - 4j) N, (2i + j) N, and F. Find F.
- (-5i - 3j) N
- (-5i + 3j) N
- (5i - 3j) N
- (5i + 3j) N
-
What is the magnitude of a force represented by the vector (6i - 8j) N?
- 10 N
- 2 N
- 48 N
- 14 N
-
What is the unit vector in the direction of the force (3i + 4j) N?
- 5i + 5j
- 0.6i + 0.8j
- 3i + 4j
- 0.3i + 0.4j
-
According to Newton's third law, what reaction accompanies particle A pulling particle B via tension T?
- Normal reaction increases
- B pulls A with T
- A pushes B with T
- Gravity acts downwards
-
What force parallel to a smooth plane inclined at angle θ holds mass m in equilibrium?
- mg
- mg sin θ
- mg tan θ
- mg cos θ
-
What is the resultant force vector on a 2 kg mass accelerating at (3i - 4j) m/s²?
- (6i - 8j) N
- (1.5i - 2j) N
- (6i + 8j) N
- (5i - 2j) N
-
What angle does the force vector (i + √3 j) N make with the positive x-axis?
- 45 degrees
- 60 degrees
- 120 degrees
- 30 degrees
-
What term describes the single force that has the same effect as several forces combined?
- Tension force
- Resultant force
- Frictional force
- Normal reaction
-
A mass m on a horizontal surface experiences an upward vertical force P < mg. What is R?
- P - mg
- mg
- mg - P
- mg + P
-
What is the direction of a particle's acceleration when moving freely in a plane?
- Resultant force
- Maximum tension
- Initial velocity
- Perpendicular force
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