<span>motion of truck constitutes of 3 travels.
1. accelerating uniformly with acceleration a1 = 2 m/s^2 until its velocity reached 20 m/s travelling a
distance of 's1' meters.
2. uniform motion with 20 m/s for a time duration t1 = 20s travelling a distance of 's2' meters.
3. uniform deceleration for t2 = 5 sec which stops the truck after travelling a distance of 's3' meters.. </span>
False because anti-lock brake system will activate automatically.
Total energy when she at the top = total energy when she at the bottom.
Energy in Joules = Power in Watts * Time in seconds.
Energy = 1000 watt * 90 seconds.
Energy = 90 000 Joules.
Any photos so i can help you with that?