WAEC Physics 2025 Theory — Question 5
Question 5 of 34 from the West African Examinations Council (WAEC) Physics 2025 Theory paper, with the correct answer and a full explanation.
Advertisement
5. A cord of natural length 5 m was extended by 0.04 m when a force of 6 N was applied. What will be the new length when a force of 8 N is applied?
Model answer
By Hooke's law, f = ke, so f/e is constant (same spring/cord). e₂ = (f₂/f₁)×e₁ = (8/6)×0.04 = 0.053 m. New length, l₂ = l₀ + e₂ = 5 + 0.053 = 5.053 m.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.