P4 Science · Chapter 15brightbit.net/worksheets
Forces — Elastic Spring Force
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
What is an elastic material?
(a) A material that breaks when stretched(b) A material that returns to its original shape and size after a deforming force is removed(c) A material that cannot be stretched or compressed(d) A material that conducts electricity when stretched
- 2.
Hooke's Law states that the extension of a spring is proportional to the force applied, provided the elastic limit is not exceeded. What happens if you stretch a spring BEYOND its elastic limit?
(a) The spring becomes shorter than before(b) The spring returns to its original length as usual(c) The spring is permanently deformed and does not return to its original shape(d) The spring vibrates at a higher frequency
- 3.
A spring has a natural length of 10 cm. A 5 N force extends it to 15 cm. What is the extension?
(a) 5 cm(b) 10 cm(c) 15 cm(d) 25 cm
- 4.
Using Hooke's Law: if a 5 N force causes a spring to extend by 5 cm, how much will a 10 N force extend the same spring (assuming the elastic limit is not exceeded)?
(a) 5 cm(b) 10 cm(c) 15 cm(d) 20 cm
- 5.
A spring balance (Newton meter) uses Hooke's Law to measure force. What physical principle allows it to do this?
(a) The spring glows brighter for larger forces(b) The extension of the spring is proportional to the force applied, allowing the scale to be calibrated(c) The spring changes colour based on the force(d) The spring compresses when heated and extends when cooled
- 6.
Which of the following is an everyday application of elastic spring force?
(a) A car engine(b) A trampoline(c) A light bulb(d) A refrigerator
- 7.
What type of energy is stored in a compressed or stretched spring?
(a) Kinetic energy(b) Thermal energy(c) Elastic potential energy(d) Chemical energy
- 8.
A student compresses a spring and places a ball on top. When released, the spring pushes the ball upward. What energy transformation occurs?
(a) Kinetic energy → elastic potential energy → gravitational potential energy(b) Elastic potential energy → kinetic energy → gravitational potential energy(c) Chemical energy → elastic potential energy → kinetic energy(d) Gravitational potential energy → elastic potential energy → kinetic energy
- 9.
A spring is 12 cm long normally. When a 3 N weight hangs from it, it is 18 cm long. What is the extension per newton?
Answer: ____________________________________
- 10.
State the meaning of "elastic limit" and explain what happens when it is exceeded.
Answer key — P4 Science: Forces — Elastic Spring Force
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- 1.(b) A material that returns to its original shape and size after a deforming force is removed
- 2.(c) The spring is permanently deformed and does not return to its original shape
- 3.(a) 5 cm
- 4.(b) 10 cm
- 5.(b) The extension of the spring is proportional to the force applied, allowing the scale to be calibrated
- 6.(b) A trampoline
- 7.(c) Elastic potential energy
- 8.(b) Elastic potential energy → kinetic energy → gravitational potential energy
- 9.2 cm per newton
- 10.the elastic limit is the maximum force beyond which the spring will not return to its original shape; if exceeded, the spring is permanently deformed
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