A horizontal line on a distance-time graph signifies zero velocity, meaning the object is stationary or at rest.
If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
Asked in UPSC CDS 2 2019 · Topic: Mechanics (Newton's Laws of Motion and their applications)
More Physics questions
- An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements after 1 minute and 10 s, respectively ?
- A bus starting from a bus-stand and moving with uniform acceleration attains a speed of 20 km/h in 10 minutes. What is its acceleration?
- Consider a journey by a car represented by the graph given below in three parts A, B and C. The speed of the car in these parts is va, vb and vc, respectively : [Image shows a Distance vs Time graph with segments O-A, A-B, B-C representing the journey parts] Which one of the following is correct in this case ?
- Newton's first law of motion is known as
- A particle moves in a circle of radius 4 m. Its linear speed is given by 4√3 t, where t is the time measured in seconds. At t = 1 s, the angle made by the resultant acceleration - r̂ with direction (+ r̂ is the radial direction) is given by φ. Which one among the following is the correct value of φ ?
- A goods train leaves a station at a certain time and at a fixed speed. After 6 hours, an express train leaves the same station and moves in the same direction as the goods train, at a uniform speed of 90 kmph. This train crosses the goods train in 4 hours. What is the speed of the goods train?
- M walks on an escalator at a rate of 5 steps per second and reaches the other end in 10 seconds. While coming back, walking at the same speed he reaches the starting point in 40 seconds. What is the number of steps on the escalator?
- A tyre has two punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?