Forces and Newton's first law

Forces and Newton's first law Quiz

Spec R1 · AQA A-Level Maths: Quiz

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1. Which statement follows from Newton's first law?
- A. A moving particle stops unless a force acts
- B. A particle at constant velocity has zero resultant force
- C. Weight and mass are the same thing
- D. Force is proportional to speed
2. Two perpendicular forces of $6$ N and $8$ N act on a particle. Find the magnitude of the resultant.
- A. $14$ N
- B. $2$ N
- C. $10$ N
- D. $48$ N
3. A car travels at constant velocity. The driving force is $900$ N. What is the resistance?
- A. $900$ N
- B. $0$ N
- C. $450$ N
- D. $1800$ N
4. A particle is in equilibrium under $(3\mathbf{i}+2\mathbf{j})$ N, $(-1\mathbf{i}+4\mathbf{j})$ N and $\mathbf{F}$ . Find $\mathbf{F}$ .
- A. $(2\mathbf{i}+6\mathbf{j})$ N
- B. $(4\mathbf{i}-2\mathbf{j})$ N
- C. $(-2\mathbf{i}+6\mathbf{j})$ N
- D. $(-2\mathbf{i}-6\mathbf{j})$ N
5. A $20$ N weight is held at rest on a smooth plane inclined at $30^\circ$ by a string parallel to the plane. Find the tension.
- A. $10$ N
- B. $17.3$ N
- C. $20$ N
- D. $40$ N