A train is travelling at 50m/s. How long does it take the train to reach 60m/s if it accelerates at a constant rate of 0.5m/s^2? How many kilometres does it travel in this time?

The initial velocity, u, is 50 ms-1 The final velocity, v, is 60 ms-1 The acceleration, a, is 0.5ms-2 The question is asking us to find the time, t. The equation of motion linking u, v, a, and t is v = u + at First we must rearrange the equation to make t the subject: t = (v-u)/a then we can substitute in the values. t = (60-50)/0.5 = 20s Now to find the displacement, s, during this time we can use s = ut + 0.5at2 s = 5020 + 0.50.5*202 = 1,100m = 1.1km

ES
Answered by Elena S. Physics tutor

2790 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

Resistors of 5 ohms and 10 ohms are connected in series with a battery supplying 3 volts. What is the total resistance ? And calculate the current in the circuit.


Why is the car moving if the unbalanced force is zero?


What is meant by 'dissipated energy'?


What is constant acceleration?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences