There are several information's already given in the question. Based on those information's the answer can be easily deduced. Mass of the truck = <span>1.5 x 10^3 kg Constant force of resistance = 400 N Final Velocity = 18 m/s Initial velocity = 0 m/s Time taken = 12 s Then Acceleration = (Final velocity - initial velocity)/Time = 18 /12 = 3/2 = 1.5 m/s^2 Then Driving force = Mass * Acceleration = 1.5 * 10^3 * 1.5 = 2250 N So Net Force = 2250 - 400 = 1850 N Average power developed = 1850 * 18 = 3.33 * 10^4 W</span>
Power = Net Force x velocity Net force = driving force - force of resistance Driving force = mass x acceleration Acceleration = (final velocity - initial velocity) / time Acceleration = (18 - 0) / 12 = 1.5 m/s² Driving force = 1.5 x 10³ x 1.5 = 2250 N Net force = 2250 - 400 = 1850 Power = 1850 x 18 = 3.33 x 10⁴ Watts
The answer to thi question is actually quite simple. Since the car goes for 3.4 seconds, and it goes 75 metres every second, the answer is just 3.4 multiplied by 75 Metres.
