Step-by-step explanation:
Force = mass × acceleration
Mass = 900kg
Acceleration = velocity ÷ time
Velocity = 60km/hr = 60 × 1000 ÷ 3600
Velocity = 60000 ÷ 3600
Velocity = 16.67m/s
To get the time
Velocity = Distance ÷ time
16.67 = 50 ÷ time
Cross multiply
16.67 × time = 50
time = 50 ÷ 16.67
time = 3 seconds
Acceleration = 16.67 ÷ 3
Acceleration = 5.56m/s²
Therefore, Force = 900 × 5.56
Force = 5004 Newton