Answer:
1500 N
Explanation:
• Initial velocity, u = 12 m/s
• Final velocity, v = 20 m/s
• Time taken, t = 6.4 s
• Mass, m = 1200 kg
[tex]\longrightarrow[/tex] F = ma
a = (v – u)/t, so
[tex]\longrightarrow[/tex] F = 1200 × (20 – 12)/6.4
[tex]\longrightarrow[/tex] F = 1200 × 8/6.4
[tex]\longrightarrow[/tex] F = 1200 × 80/64
[tex]\longrightarrow[/tex] F = 1200 × 40/32
[tex]\longrightarrow[/tex] F = 1200 × 20/16
[tex]\longrightarrow[/tex] F = 300 × 20/4
[tex]\longrightarrow[/tex] F = 300 × 5
[tex]\longrightarrow[/tex] F = 1500 N (Answer)
