A train is moving with a speed of 100mph. What will be its speed in m/s.?
Correct answer: A. 45 m/s
- A. 45 m/s
- B. 90 m/s
- C. 100 m/s
- D. 120 m/s
Explanation
Convert miles per hour using 1 mile = 1609.344 m and 1 hour = 3600 s: 100 mph = 100 × 1609.344 m / 3600 s = 44.704 m/s, which rounds to 45 m/s. The likely mistake is choosing 100 m/s by leaving the numerical value unchanged while changing units.
Last updated
About Displacement and Velocity
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 15 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1024 can be written in scientific notation as______________?
A body can have constant velocity when it follows a_____________?
A body is moving with uniform velocity. Its______________________?
A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?
A boy walks to his school at a distance of 6km with a speed of 3km/h and walks back with a constant speed of 2km/h. His average speed for round trip in km/h is: