Fig. 1.1 depicts a lorry travelling along a straight stretch of road. The arrows indicate the horizontal forces acting on the lorry. These forces lie on one straight line.
(a(i))[2]
Calculate the magnitude of the resultant horizontal force acting on the lorry.
(a(ii))[1]
Describe the effect of a horizontal resultant force of zero on the lorry's speed. Put a tick (✓) in one box.
speed increases to a higher constant speed
speed stays the same
speed decreases to a lower constant speed
speed decreases to zero
(b(i))[1]
Calculate the total stopping distance when the motorcycle speed is 20 m/s.
(b(ii))[1]
Suggest one factor that could make the total stopping distance longer.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “1000 + 500 OR 1500 OR 1500 - 1500 OR 1500 - their ‘1500’ OR 1500 - 1000 OR 1500 - 500” …