CIE iGCSE Co-Ordinated Science P1.1 Physical quantities and measurement techniques Exam Style Questions Paper 4
Question
(a) Fig. 3.1 shows a speed–time graph for a journey made by a car.
(i) Use Fig. 3.1 to determine the distance travelled by the car during the first 40 seconds of this journey.
distance = …………………………………………….. m
(ii) During the first 40 seconds of the journey, the car accelerates.
Define the term acceleration.
(iii) The maximum store of kinetic energy of the car during this journey is 108000J.
Use information from Fig. 3.1 to calculate the mass of the car.
mass = ……………………………………………. kg
(b) The car’s headlamps emit light with a frequency of 5.6 × 1014 Hz.
Calculate the wavelength of this light in air.
wavelength = …………………………………………….. m
▶️Answer/Explanation
Ans :
3(a)(i) (height × length) ÷ 2 / (40 × 12) ÷ 2 ;
240 (m) ;
3(a)(ii) rate of change of velocity / change in velocity divided by time ;
3(a)(iii) (m=) 2Ek /v2 OR 2 × 10800 / 144 ;
(m=) 1500 (kg) ;
3(b) use of 3.0 × 108 (m / s) ;
(λ =) v/f OR 3.0 × 108 ÷ 5.6 × 1014 ;
(λ =) 5.4 × 10–7 (m) ;