# Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws Practice Questions

The following physics revision questions are provided in support of the physics tutorial on Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws tutorials. The Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Relativity Learning Material
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18.1Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws

## Physics Revision Questions for Relativity. Galilean Transformations. Einstein's Postulates and Newton's Laws

1. A truck is moving at 126 km/h due East and a car is travelling at 30 m/s due West. Both objects are moving at constant velocity. The initial distance between the vehicles is 1.2 km. Which is the equation of motion by which the car approaches the truck if a traffic light - which is 300 behind the truck - is chosen as origin of the inertial frame of reference? Take the West-to-East direction as positive.

1. x(t) = 1200 - 65t [in metres]
2. x(t) = 1500 - 65t [in metres]
3. x(t) = 1500 - 156t [in metres]
4. x(t) = 900 - 156t [in metres]

2. A passenger is walking at 2m/s towards the end of a bus which is moving at 72 km/h. What is the relative velocity of the passenger to the ground if the moving direction of the bus is taken as positive?

1. 74 km/h
2. -70 km/h
3. 22 m/s
4. -18 m/s

3. Which of the following is NOT an inertial frame of reference?

1. The Earth
2. The Sun
3. A car moving at constant velocity
4. An object falling freely

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5. Continuing learning relativity - read our next physics tutorial: Classical Principle of Relativity