Home
Class 11
PHYSICS
A man walks on a straight road from his ...

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km.`h^(-1)` . Finding the market closed he instantly turns and walks back home with a speed of 7.5 km.`h^(-1)` . What is the
average speed of the man over the interval of time (i) 0 to 30 min (ii) 0 to 50 min (iii) 0 to 40 min?
[Note: you will appreciate speed as total path length divided by time and not as magnitude of average velocity. You would not like to tell the tired man on his return home that his average speed was zero! ]

Text Solution

Verified by Experts

The correct Answer is:
5 km .`h^(-1)` ; (ii) 6 `"km.h"^(-1)`; (iii) 5.625 `"km.h"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ONE - DIMENSIONAL MOTION

    CHHAYA PUBLICATION|Exercise Hots Numerical Problems (Based on Rectilinear Motion)|30 Videos

  • ONE - DIMENSIONAL MOTION

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Assertion-reason type )|12 Videos

  • ONE - DIMENSIONAL MOTION

    CHHAYA PUBLICATION|Exercise Problem Set - II (Based on Vertical Motion )|9 Videos

  • NEWTONIAN GRAVITATION AND PLANETARY MOTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|19 Videos

  • QUESTION PAPERS OF NEET -2017

    CHHAYA PUBLICATION|Exercise QUESTION|32 Videos

Similar Questions

Explore conceptually related problems

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km. h^(-1) . Finding the market closed he instantly turns and walks back home with a speed of 7.5 km. h^(-1) . What is the (a) magnitude of average velocity and

A man travels a certain distance with a uniform speed of 5 km/h ad returns the same distance with a uniform speed of 4km/h. What is the average speed of the man?

A car moves with a speed of 30 "km.h"^(-1) in half of the total time taken and with 40 "km.h"^(-1) rest of the time, What is the average speed of the body?

A car is moving along a circular path of radius 20 m with a speed of 40 km cdot h^(-1) . Find its angular velocity.

A boy goes to school from his home at a speed of x km/h and comes back at a speed of y km/h, then his average speed is-

A woman starts from her home at 9.00 am, walks with a speed of 5 km h^(-1) on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 25 km h^(-1) . Choose suitable scales and plot the x-t graph of her motion.

A boy goes to school from him home at a speed of x km/hr. and comes back at a speed of y km/hr. then the average speed of the boy is given by