MediumPhysicsfluid
+4 / -1
-- 2. A person travels along a straight road for the first 1/3 time with a speed v1 and for next 2/3 time with a speed v2. Then the mean speed v is given by
A
v = (v1 + 2v2) / 3
B
1/v = 1/(3v1) + 2/(3v2)
C
v = 1/3 * sqrt(2v1v2)
D
v = sqrt(3v2 / 2v1)
Explanation
Average speed = Total Distance / Total Time. Distance d1 = v1 * (T/3), d2 = v2 * (2T/3). Total Distance = (v1T/3) + (2v2T/3). v_avg = [T/3 * (v1 + 2v2)] / T = (v1 + 2v2) / 3.
Previous
1. Assertion: Number of significant digit in 0.002 is one and that in 0.500 is t
Next-- 3. A particle is moving along x-axis. Its position (x) varies with time (t) a
More from fluid
Easy
-- In a p-type semiconductor, the majority charge carriers are
Easy-- The energy of an electron in nth orbit of hydrogen atom is E_n = -13.6/n² eV. The energy required
Medium-- Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with like poles
Medium-- For the logic circuit shown below, the truth table is
MediumThe susceptibility of a paramagnetic material is χ at 27°C. At what temperature will its susceptibil
Medium-- 8. Assertion (A): Nuclear density is nearly same for all the atoms.Reason (R): The radius of nucl
Practice Physics Exams
Full-length mock tests with detailed analytics, rank, and percentile.
Browse Exams