A trolley of mass 2.0 kg moves to the right at 3.0 m/s.
It collides with a trolley of mass 1.0 kg moving to the left at 2.0 m/s.
The two trolleys stick together.
What is the velocity of the trolleys just after the collision?
0.67 m/s0.67\ \text{m/s}0.67 m/s to the left
1.3 m/s1.3\ \text{m/s}1.3 m/s to the right
2.7 m/s2.7\ \text{m/s}2.7 m/s to the right
1.3 m/s1.3\ \text{m/s}1.3 m/s to the left
50 exam-style questions on OCR GCSE Physics 2.2 Newton’s laws, covering 2.2.1 Interactions between objects, 2.2.2 Force pairs in interactions, 2.2.3 Forces as vectors, 2.2.4 Newton's first law, 2.2.5 Resolving forces with vector diagrams, 2.2.6 Forces acting on an isolated object, 2.2.7 Free body diagrams and resultant force, 2.2.8 Free body diagrams for balanced forces, 2.2.9 Newton's second law, 2.2.10 Inertia and inertial mass, 2.2.11 Momentum in collisions, 2.2.12 Relating force, mass, velocity and acceleration, 2.2.13 Work done by a force, 2.2.14 Work, stored energy and units of energy, 2.2.15 Power as the rate of energy transfer, 2.2.16 Newton's third law, and 2.2.17 Circular motion and changing velocity. Each one has a worked solution and a mark scheme showing where the marks go.