Question

a dog ran after a car.the car is traveling and average speed of 5 m/s. the dog runs 20 m in 5 s. does she catch the car?

Answer 1

Answer:

No

Explanation:

Average speed of car = 5m/s

Distance run by dog = 20m

Time taken = 5s

problem;

does the dog catches the car = ?

Solution;

let us determine speed of the dog;

Speed = distance / time.

=. 20/5

= 4m/s

The average speed of the car is 5m/s

Average speed of the dog is 4m/s

The dog is slower than the car and it will not catch the car at this rate

Answer 2

Given :

Average speed of car = 5 m/sec

Distance covered by the dog in 5 sec = 20 m

To Find :

Whether dog can catch the car or not.

Solution :

Speed of the dog = $\frac{Distance}{Time}$

                              = $\frac{20}{5}$

                              = 4 m/sec

Dog is travelling with a speed of 4 m/sec. To catch the car her speed must be greater or equal to the speed of the car.

The speed of the car is 5 m/sec which is greater than the speed of dog.

Hence, the dog will not be able to catch the car.