Answer:
-200 N
Explanation:
Force: This can be defined as the product of mass and acceleration The S.I unit is N
The expression for force is given as
F = m(v-u)/t................... Equation 1
Where F = Impact force, m = mass of the lorry , v = Final velocity of the lorry , u = initial velocity of the lorry, t = time
Given: m = 6000 kg, v = 0 m/s (the lorry was stopped), u = 0.5 m/s, t = 1.5 s
Substitute into equation 1
F = 6000(0-0.5)/1.5
F = -300/1.5
F = -200 N.
Note: The negative sign shows that the impact force act in opposite direction to the initial motion of the lorry
