A package on a horizontal test track accelerates from rest to 6.0 m s−16.0\ \mathrm{m\,s^{-1}}6.0 ms−1 in 2.0 s. The resultant force on the package is 240 N.
Calculate the mass of the package.
A 20 kg load is then added to the package and the resultant force is increased to 360 N. Calculate the new acceleration of the package.
103 exam-style questions on Edexcel GCSE Physics 2.3 Forces and Newton's laws, covering 2.3.1 Newton's first law, 2.3.2 Newton's second law, and 2.3.3 Weight and gravitational field strength. Each one has a worked solution and a mark scheme showing where the marks go.