- Displacement in the n-th second formula: S_n = u + a(n - 1/2). - Uniform acceleration from rest means u=0. - Percentage increase calculation involves finding the difference, dividing by the original value, and multiplying by 100.
A particle moves with uniform acceleration along a straight line from rest. The percentage increase in displacement during sixth second compared to that in fifth second is about
Asked in UPSC CDS 2 2018 · Topic: Mechanics (Newton's Laws of Motion and their applications)
More Physics questions
- The position vector of a particle is r⃗ = 2t2 x̂ + 3t ŷ + 4 ẑ. Then the instantaneous velocity v and acceleration a⃗ respectively lie
- Two persons are holding a rope of negligible mass horizontally. A 20 kg mass is attached to the rope at the midpoint; as a result the rope deviates from the horizontal direction. The tension required to completely straighten the rope is (g = 10 m/s2)
- The direction of magnetic field at any location on the earth's surface is commonly specified in terms of
- A car undergoes a uniform circular motion. The acceleration of the car is
- If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
- 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 ?