Lesson 3.03e
3.03e Newton's second law in two dimensions Quiz: OCR Maths, Unit 18
20 questions
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Lesson 3.03e, Newton's second law 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
-
In Newton's second law, which vector quantity is directly proportional to the resultant force vector?
- Displacement
- Acceleration
- Velocity
- Momentum
-
A force of (6i + 8j) N acts on a mass of 2 kg. What is the acceleration vector?
- (3i + 4j) m s^-2
- (3i - 4j) m s^-2
- (4i + 3j) m s^-2
- (12i + 16j) m s^-2
-
A force of (6i + 8j) N acts on a mass of 2 kg. What is the magnitude of acceleration?
- 5 m s^-2
- 7 m s^-2
- 10 m s^-2
- 14 m s^-2
-
What component of weight acts down a smooth slope inclined at angle θ to the horizontal?
- mg
- mg sin θ
- mg tan θ
- mg cos θ
-
What component of weight acts perpendicular to a slope inclined at angle θ to the horizontal?
- mg tan θ
- mg cos θ
- mg
- mg sin θ
-
A mass of 3 kg has an acceleration of (2i - 4j) m s^-2. What is the resultant force?
- (2i - 4j) N
- (6i - 12j) N
- (1.5i - 6j) N
- (6i + 12j) N
-
Forces (2i + 3j) N and (4i + 5j) N act on a 2 kg particle. What is its acceleration?
- (12i + 16j) m s^-2
- (3i + 4j) m s^-2
- (1.5i + 2j) m s^-2
- (6i + 8j) m s^-2
-
A particle slides down a smooth plane inclined at 30° to the horizontal. What is its acceleration?
- 0.25g m s^-2
- 0.5g m s^-2
- 0.866g m s^-2
- g m s^-2
-
What vector equation represents Newton's second law for a constant mass particle?
- a = F m
- F = ma
- F = m / a
- F = m v
-
A force of 10 N acts at 60° to the horizontal. What is its horizontal component?
- 2.5 N
- 8.66 N
- 5 N
- 10 N
-
A force of 10 N acts at 60° to the horizontal. What is its vertical component?
- 10 N
- 5 N
- 5√3 N
- 2.5 N
-
A force of (15i + 20j) N acts on an object. What is the magnitude of this force?
- 35 N
- 17.5 N
- 5 N
- 25 N
-
A 4 kg block on a smooth horizontal floor is pulled by 20 N at 60°. What acceleration results?
- 10 m s^-2
- 5 m s^-2
- 4.33 m s^-2
- 2.5 m s^-2
-
If the resultant force on a particle is zero, what is its acceleration vector?
- (9.8j) m s^-2
- (i + j) m s^-2
- (0i + 0j) m s^-2
- (i - j) m s^-2
-
A particle of mass 2 kg has acceleration vector (3i - 4j) m s^-2. What magnitude force acts?
- 5 N
- 20 N
- 10 N
- 14 N
-
A 2 kg mass has velocity v = (3t^2 i + 4t j) m s^-1. What force acts at t = 1 s?
- (6i + 8j) N
- (12i + 8j) N
- (6i + 4j) N
- (3i + 4j) N
-
A mass accelerates down a smooth slope at g sin θ. What force causes this acceleration?
- Frictional force
- Normal reaction
- Component of weight
- Tension force
-
On a smooth slope, which force balances the perpendicular component of weight?
- Normal reaction
- Air resistance
- Tension force
- Friction force
-
Forces (i + 2j) N and F2 act on a body in equilibrium. What is vector F2?
- (-i - 2j) N
- (i - 2j) N
- (i + 2j) N
- (-i + 2j) N
-
In SI units, what standard unit represents force calculated using F = ma?
- Newton
- Watt
- Joule
- Pascal
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