A spring of constant 250 N/m is stretched by 4.0 cm. How much elastic potential energy is stored?
Answer and explanation
Correct answer: B. 0.20 J
- Step 1: with m. Step 2. J. Answer: 0.20 J. Why not the others: 0.40 J omits the factor of one half; 10 J is the force , not the energy; 2000 J uses the extension in centimetres.
Practise more Mechanics and materials.
Free questions with an explanation for every one, and full timed A-Level UK (AQA, Edexcel, OCR) mock tests.
More Mechanics and materials questions
- Two perpendicular forces of 6.0 N and 8.0 N act on an object at a point. What is the size of the resultant force?
- A ball is launched at 20 m/s at 30 degrees above the horizontal from level ground (g = 9.81 m/s2, no air resistance). What is its horizontal…
- A skydiver reaches terminal velocity. What is true at this point?
- A 0.15 kg ball hits a wall at 20 m/s and rebounds at 15 m/s. What is the magnitude of the impulse on the ball?
- A 3.0 kg trolley moving at 2.0 m/s collides with a stationary 1.0 kg trolley and they stick together. How much kinetic energy is lost?
- A 50 N force acts at 60 degrees to the direction of travel and moves an object 4.0 m. How much work does it do?