An engineering technician is calibrating a steel tension spring in a quality control laboratory. The technician has the uncalibrated spring, a high-precision digital caliper, and a 18.0 N calibration block.
Describe how the technician can use this equipment to determine the spring constant of the spring.
The 18.0 N calibration block has a flat, square base of side length 0.06 m.
Calculate the pressure exerted by the calibration block when it is placed on a flat horizontal test bench.
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.