A student has a spring, a ruler, and a 3.0 N3.0\text{ N}3.0 N weight.
Describe how the student can use this equipment to determine the spring constant of the spring.
The 3.0 N3.0\text{ N}3.0 N weight has a contact surface area of 0.004 m20.004\text{ m}^20.004 m2.
Calculate the pressure exerted by the weight when it is placed on a flat horizontal surface.
Use the equation:
pressure=force normal to a surfacearea of that surface \text{pressure} = \frac{\text{force normal to a surface}}{\text{area of that surface}} pressure=area of that surfaceforce normal to a surfacePressure = ______________ Pa\text{Pa}Pa
Explain why more than one force must be applied to an object to stretch, bend, or compress (change the shape of) it.
Describe the difference between elastic deformation and inelastic (plastic) deformation.
39 exam-style questions on OCR GCSE Physics Forces in action. Each one has a worked solution and a mark scheme showing where the marks go.