Quantities and units in mechanicsAQA A-Level Maths: Mind map

Exam questions on Quantities and units in mechanics

1. A crate of mass $15$ kg rests on a table. Take $g=9.8$ m s$^{-2}$ on Earth.
   The crate is taken to the Moon, where $g=1.6$ m s$^{-2}$. State its mass and find its weight there.2 marks
2. A cyclist travels $1.2$ km in $4$ minutes at a constant speed along a straight road.
   The cyclist then speeds up uniformly from $5$ m s$^{-1}$ to $8$ m s$^{-1}$ in $6$ s. Find the acceleration, including its unit.2 marks
3. A trolley of mass $8$ kg is pulled across a smooth horizontal floor by a resultant horizontal force of $20$ N. Take $g=9.8$ m s$^{-2}$.
   Find the acceleration of the trolley, and show that the unit you use for acceleration is consistent with $1$ N being $1$ kg m s$^{-2}$.3 marks