Newton's third law, pulleys and connected particles

Newton's third law, pulleys and connected particles Quiz

Spec R4 · AQA A-Level Maths: Quiz

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1. A car ( $800$ kg) pulls a trailer ( $200$ kg) with a force of $1500$ N and no resistance. Find the acceleration.
- A. $1.5$ m s⁻²
- B. $0.67$ m s⁻²
- C. $7.5$ m s⁻²
- D. $1.9$ m s⁻²
2. In the situation above, find the tension in the coupling.
- A. $1500$ N
- B. $300$ N
- C. $1200$ N
- D. $200$ N
3. Which statement about Newton's third law is correct?
- A. The two forces act on the same body
- B. The two forces are equal and opposite and act on different bodies
- C. The forces cancel so nothing moves
- D. The reaction is always smaller than the action
4. Masses $2$ kg and $4$ kg hang over a smooth pulley. Find the acceleration ( $g=9.8$ ).
- A. $9.8$ m s⁻²
- B. $4.9$ m s⁻²
- C. $1.63$ m s⁻²
- D. $3.27$ m s⁻²
5. Two strings of tension $T=10$ N, one horizontal and one vertical, meet at a smooth pulley. Find the force on the pulley.
- A. $20$ N
- B. $10$ N
- C. $14.1$ N
- D. $100$ N