A car travelling at 14 m/s has to make an emergency stop so applies the brakes and it takes 1.5s to become stationary. What distance has the van travelled in that time?
Assuming constant deceleration we can use the equation s = t(u+v)/2, where u=14m/s, v=0m/s and t=4s. Inputting these values we have that the distance travelled s = 1.5(14)/2 = 21/2 = 10.5m
u = the starting velocityv = the final velocityt = times = the distance travelled
CJ
Related Physics GCSE answers
All answers ▸explain how the resistance of a filament lamp changes as the potential difference across it increases
What is the wavelength of a wave travelling at 20ms^-1 with a time period of 0.2s
What is the difference between Transverse and Longitudinal waves?
A kettle has a 55% energy efficiency. The input energy for the kettle is 378,000 J per boil. Calculate the amount of energy dissipated in 5 boils.