Lesson 3.03a
3.03a Force as a vector Quiz: OCR Maths, Unit 18
20 questions
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Lesson 3.03a, Force as a vector: 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 two quantities are needed to fully describe a vector force?
- Speed and direction
- Magnitude and direction
- Magnitude and mass
- Mass and acceleration
-
What effect does a non-zero resultant force have on an object's motion?
- Keeps speed constant
- Reverses its direction
- Increases its mass
- Changes its velocity
-
What is the state of an object when all forces acting on it are balanced?
- At terminal mass
- In equilibrium
- Under acceleration
- Decelerating continuously
-
According to Newton's first law, what path does a moving object take if resultant force is zero?
- Straight line
- Parabolic curve
- Circular path
- Spiral path
-
In a force diagram, what does the length of a directed line segment represent?
- Magnitude of force
- Direction of motion
- Mass of body
- Speed of body
-
Which term describes the single force that has the same effect as multiple combined forces?
- Frictional force
- Resultant force
- Equilibrium force
- Reaction force
-
What type of quantity is force because it possesses both magnitude and direction?
- Tensor
- Constant
- Scalar
- Vector
-
What single force is required to keep an object in equilibrium against a resultant force R?
- -R
- R
- Zero
- 2R
-
A force is given by vector (3i - 4j) N. What is its magnitude?
- 12 N
- 5 N
- 7 N
- 1 N
-
Forces (2i + 5j) N and (4i - 2j) N act on a particle. What is the resultant force?
- (6i - 3j) N
- (6i + 3j) N
- (8i - 10j) N
- (2i + 7j) N
-
A particle is in equilibrium under forces (ai + 4j) N and (3i - bj) N. What is value a?
- 4
- -4
- 3
- -3
-
A particle moves at constant velocity under two forces. One force is (5i - 2j) N. What is the other?
- (5i + 2j) N
- (2i - 5j) N
- (5i - 2j) N
- (-5i + 2j) N
-
A 10 N force acts at 60 degrees to the horizontal. What is its horizontal component?
- 20 N
- 10 N
- 8.66 N
- 5 N
-
A 10 N force acts at 30 degrees to the horizontal. What is its vertical component?
- 8.66 N
- 15 N
- 10 N
- 5 N
-
A box of weight 50 N rests on a horizontal table. What is the magnitude of the normal reaction?
- 100 N
- 50 N
- 25 N
- 0 N
-
An object moves at a steady speed of 12 m s⁻¹ in a straight line. What is the resultant force?
- 0 N
- 1.2 N
- 120 N
- 12 N
-
Three forces (i + 2j) N, (2i - j) N, and F N keep a body in equilibrium. What is force F?
- (-3i + j) N
- (3i + j) N
- (-3i - j) N
- (3i - j) N
-
Two forces of magnitude 6 N and 8 N act at right angles. What is the magnitude of their resultant?
- 14 N
- 2 N
- 10 N
- 48 N
-
Three coplanar forces in equilibrium are connected tip-to-tail. What shape do their vector arrows form?
- Open square
- Closed triangle
- Circle
- Straight line
-
Force F has components 8 N east and 6 N north. At what bearing does F act, to nearest degree?
- 127°
- 037°
- 143°
- 053°
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