A strip of paper is fixed to a small toy car. As the toy car travels, it drags the strip of paper through a timer. The timer places a dot on the paper every $0.020\,\text{s}$. Fig. 1.1 shows part of the strip with the first four dots. The first dot made on the paper is marked A.
(a(i))[1]
Choose the box that matches the car's motion.
- acceleration
- constant speed
- deceleration
(a(ii))[2]
Explain the answer you gave.
(b)[4]
Each dot's distance from A is $d$. Dot A was placed on the strip at time $t = 1.000\,\text{s}$. Use Fig. 1.1 for the measurements and, in the space provided, draw a results table for $d$ against $t$.
(c)[1]
Use your data to work out the average speed of the car from $t = 1.000\,\text{s}$ to $t = 1.060\,\text{s}$. Use the equation
average speed $= \frac{\text{distance travelled}}{\text{time taken}}$.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The car is decelerating.” …