Anda boleh muat turun latihan-latihan ini di sini. (You can download the printable version of this exercise here.)
1. Lengkapkan penukaran unit bagi laju berikut.
1. Complete the following unit conversion of speed.
- 90 kmh-1 = __________ ms-1
- 110 kmh-1 = __________ ms-1
- 1.3 ms-1 = __________ kmh-1
- 8.12 ms-1 = __________ kmh-1
Jawapan:
a.
![](https://latex.codecogs.com/png.latex?\begin{array}{*{20}{l}}&space;{90km{j^{_{&space;-&space;1}}}}\\&space;\begin{array}{l}&space;=&space;\frac{{90km}}{{1j}}\\&space;=&space;\frac{{90&space;\times&space;{{10}^3}m}}{{60&space;\times&space;60s}}&space;=&space;25m{s^{&space;-&space;1}}&space;\end{array}&space;\end{array}\)
b.
![](https://latex.codecogs.com/png.latex?\begin{array}{*{20}{l}}&space;{110km{j^{_{&space;-&space;1}}}}\\&space;\begin{array}{l}&space;=&space;\frac{{110km}}{{1j}}\\&space;=&space;\frac{{110&space;\times&space;{{10}^3}m}}{{60&space;\times&space;60s}}&space;=&space;30.6m{s^{&space;-&space;1}}&space;\end{array}&space;\end{array})
c.
![](https://latex.codecogs.com/gif.latex?\begin{array}{l}&space;1.3m{s^{_{&space;-&space;1}}}&space;=&space;\frac{{1.3m}}{{1s}}\\&space;=&space;\frac{{\frac{{1.3km}}{{1000}}}}{{\frac{{1j}}{{60&space;\times&space;60}}}}\\&space;=&space;\frac{{1.3km}}{{1000}}&space;\times&space;\frac{{60&space;\times&space;60}}{{1j}}\\&space;=&space;4.68km{j^{_{&space;-&space;1}}}&space;\end{array})
d.
![](https://latex.codecogs.com/gif.latex?\begin{array}{*{20}{l}}&space;{8.12m{s^{_{&space;-&space;1}}}&space;=&space;\frac{{8.12m}}{{1s}}}\\&space;\begin{array}{l}&space;=&space;\frac{{\frac{{8.12km}}{{1000}}}}{{\frac{{1j}}{{60&space;\times&space;60}}}}\\&space;=&space;\frac{{8.12km}}{{1000}}&space;\times&space;\frac{{60&space;\times&space;60}}{{1j}}\\&space;=&space;29.2km{h^{_{&space;-&space;1}}}&space;\end{array}&space;\end{array})