Question

A train is travelong at 22 m/s when the condutor gets a radio call about a car stalled on the tracks. He hits the emergancy brake and the train comes to a halt in 135 sevonds several meters before the car. What was the train's accleration during the emergency?

Answer 1

final velocity = 0

because the train stoped

so,

• acceleration = (v - u) ÷ t
• acceleration = (0 - 22) ÷ 135
• acceleration = -22 ÷ 135

• acceleration = -0.162 m/s²