Home
Class 12
PHYSICS
On a long horizontally moving belt (Fig....

On a long horizontally moving belt (Fig.3.26), a child runs to and fro with a speed `9 km h^(-1)` (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of `4 km h^(-1)`. For an observer on a stationary platform outside, what is the
(a) speed of the child running in the direction of motion of the belt ?
(b) speed of the child running opposite to the direction of motion of the belt ?
(c) time taken by the child in (a) and (b)?
Which of the anseres alter if motion is viewed by one of the parents ?

A

4 km `h^(-1)`

B

`5 km h^(-1)`

C

9 km `h^(-1)`

D

13 km`h^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

On a long horizontally moving belt, a child runs to an fro with a speed 9 kmh^(-1) ( with respect to the belt) between his father and mother located 50m a part on the moving belt. The belt moves with a speed of 4 kmh^(-1) . For an observer on a stationery platform outside, what is the (i) speed of the child running in the direction of motion of the belt, (ii) speed of the child running opposited to the direction of motion of the belt , and (iii) time taken by child in (i) and (ii) ? which of the answers alter if motion is viewed by one of the parents?

On a long horizontally moving belt, a child runs to and fro with a speed 9 kmh^(-1) ( with respect to the belt) between his father and mother located 50m a part on the moving belt. The belt moves with a speed of 4 kmh^(-1) . For an observer on a stationery platform outside, what is the (i) speed of the child running in the direction of motion of the belt? (ii) speed of the child running opposite to the direction of motion of the belt? (iii) time taken by child in (i) and (ii) ? which of the answers alter if motion is viewed by one of the parents?

A long belt is moving horizontally with a speed of 5 km/h. A child is running on belt to and fro with a speed of 9 km/h with respect to belt between his father and mother located 50 m apart on the belt. For an observer on a stationary platform outside, what is the speed of the child running opposite to the direction of the belt ?

What is the kinetic energy of a 10kg mass moving at a speed of 30 km h^(-1) in calorie?

A car is moving towards east with a speed of 25 km h^-1 . To the driver of the car, a bus appears to move towards north with a speed of 25 sqrt(3) km h^-1 . What is the actual velocity of the bus ?

A car is moving on a straight road covers one third of the distance with a speed of 30 km/h and the rest with a speed of 50 km/h. The average speed of the car is

Two parallel rail tracks run north-south. On one track train A moves north with a speed of 54 km h^(-1) and on the other track train B moves south with a speed of 90 km h^(-1) . The velocity of train A with respect to train B is

A train is moving due East and a car is moving due North, both with the same speed 30 km h^(-1) . What is the observed speed and diredction of motion of car to the passsenger in the train ?

A train moves northwards with speed 80 km h^(-1) . While a car moves towards east with a speed of 60 km h^(-1) , what is the velocity of the train w.r.t the driver of the car ?