Question

A vehicle moving at 5m/s, i . what should be the constant declaration in order to stop it within 15m? ii. How long it takes to stop?​

Answer 1

Answer:

Refer to the attachment for solution (1).

Calculating time taken by it to stop (t) :

By using the second equation of motion,

→ v = u + at

• v denotes final velocity
• u denotes initial velocity
• t denotes time
• a denotes acceleration

→ 0 = 5 + (-5/6)t

→ 0 = 5 - (5/6)t

→ 0 + (5/6)t = 5

→ (5/6)t = 5

→ t = 5 ÷ (5/6)

→ t = 5 × (6/5)

→ t = 6 seconds

→ Time taken to stop = 6 seconds