Usha swims in a 90 m long pool. She covers 180 m in one minute by swimming from one end to the other and back along the same length path. Find the average speed and average velocity of Usha.

A girl drove to a hospital from her home and noted the odometer reading of her car increased by 12 km. The trip took 18 min. If she returned home by the same path 7h 30 min after she left, what was her average speed and velocity for the entire tip?

A boy goes to market at an average speed of 29 kmh^-1 .finding the market closed he return back by same path with an average speed of 40 km h^-1 . find the average speed and velocity for complete journey.

Joseph jogs from one end to the other end B of a straight 300m road in 2minutes 30 seconds and then turns around and jogs 100m back to point C in another 1minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Read each statement below carefully and state with reasons, if it is true or false :- the average speed of a particle (defined as total path length divided by the time taken to cover the path) is either greater or equal to the magnitude of average velocity of the particle over the same interval of time,

The two parallel circular loops of wire shown in fig each have a radius R = 20 cm and are separated by a distance a = 0.5 cm. The bottom loop is held fixed and the top loop hangs from one end of the arm of an equal arm balance. Since a is much smaller than R, the magnetic field produced by one loop at the other is practically the same as if both were long straight wires. if the current in each loop is 20 A. How much additional mass m must be added to the right-hand pan of the balance to keep the loops separated by 0.5 cm, when the currents are turned on?