A large delivery truck is designed with a curved wind deflector on the roof of its cab. Explain how this design helps to improve the fuel efficiency of the truck.
The truck climbs up a hill at a constant speed. The vertical height of the hill is 15 m15\text{ m}15 m and the length along the road is 120 m120\text{ m}120 m.
State the relationship between work done, force and distance moved in the direction of the force.
The total weight of the truck is 220 kN220\text{ kN}220 kN. Calculate the work done against gravity by the truck in climbing to the top of the hill.
The truck takes 22.0 s22.0\text{ s}22.0 s to climb the hill. Calculate the useful power output of the truck. State the unit.
The graph below shows the velocity of the truck during another part of its journey.
State the relationship between acceleration, change in velocity, and time taken.
Calculate the acceleration of the truck during the first 5 s5\text{ s}5 s.
Calculate the total distance travelled by the truck during the 10 s10\text{ s}10 s shown on the graph.
The truck has 8 tyres8\text{ tyres}8 tyres in contact with the ground.
State the relationship between pressure, force, and area.
The pressure in each tyre is 250 kPa250\text{ kPa}250 kPa. Calculate the area of each tyre that is in contact with the road, assuming the weight of 220 kN220\text{ kN}220 kN of the truck is distributed equally among them.
