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Multiplication of a Vector by a Scalar
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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 2.3 | Multiplication of a Vector by a Scalar |
Multiplication of a Vector by a Scalar Revision Questions
1. The vector in the figure shows a force F exerted on an object.
Which of the following vectors represents the vector -1.5F ?<> 
Correct Answer: D
2. The definition of some common forces acting in objects is provided below.
- Gravitational force - the downwards force caused by the Earth attraction (gravity)
- Active force - the pushing or pulling force which makes objects move forward
- Weight - the force by which an object pushes the ground
- Normal force - the reaction force of the ground to the object
- Frictional force - the resistive force to the motion
In which of the equations below the constant C is negative for the situation involving an object moving horizontally?
- Gravitational force = Constant × Weight
- Frictional force = Constant × Normal force
- Active force = Constant × Frictional force
- Active force = Constant × Gravitational force
Correct Answer: C
3. An object moves 40 km due North and then it moves for other 10 km due South. What is the value of the constant relating the second displacement to the first one?
- 400
- - 4 km
- 4 km
- - 4
Correct Answer: B
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- Continuing learning vectors and scalars - read our next physics tutorial: Dot (Scalar) Product of Two Vectors
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