Question

If a car travels a distance of 600 m in 30 s,calculate is speed.

Answer 1

Explanation:

s = d/t

s = (600/30 )m/s

s = 20 m/s ...

s is speed, d is distance, and t is time..

Answer 2

Given:

Distance travelled by car,d= 600 m

Time taken,t= 30 s

To Find:

Speed of car

Diagram:

$\setlength{\unitlength}{1cm}\thicklines\begin{picture}(30,15)\put(1.85,1.1){\oval(2.5,1.6)[t]}\put(1.85,1.1){\oval(2.28,1.36)[t]}\put(0.7,1.2){\line(1,0){2.3}}\put(1.85,1.2){\line(0,1){0.6}}\put(0,0){\line(1,0){6.5}}\put(0.1,0.3){\line(1,0){0.5}}\put(1.2,0.3){\line(1,0){1.42}}\put(3.2,0.3){\line(1,0){0.5}}\put(1.9,0.3){\oval(3.6,1.6)[t]}\put(3.2,0.69){\line(1,0){0.2}}\put(3.2,0.69){\line(0,1){0.2}}\qbezier(3.2,0.89)(3.44,0.82)(3.4,0.69)\put(0.43,0.69){\line(1,0){0.2}}\put(0.6,0.69){\line(0,1){0.2}}\qbezier(0.43,0.69)(0.3,0.8)(0.6,0.89)\put(3.8,1.4){ \rm{t=30s} }}\put(0.9,0.3){\circle{0.55}}\put(2.9,0.3){\circle{0.55}}\put(0.9,0.3){\circle*{0.3}}\put(2.9,0.3){\circle*{0.3}}\put(3.5,2.8){\vector(1,0){1.5}}\put(3.4,2.4){ \rm{d=600m} }}\end{picture}$

Solution:

We know that,

• Relation between speed, distance and time is given by

$\pink{\underline{\boxed{\bf{Speed=\dfrac{Distance}{Time}}}}}$

$\rule{190}{1}$

Let the speed of car be S

So,

$\longrightarrow\rm{S=\dfrac{d}{t}}$

$\longrightarrow\rm{S=\dfrac{\cancel{600}}{\cancel{30}}}$

$\longrightarrow\rm\green{S=20\ m/s}$

Hence, the speed of car is 20 m/s.

$\rule{190}{1}$

Additional Information

Speed

The distance covered by moving body in unit time is called speed of the body.

Average Speed

Average speed is defined as the ratio of total distance covered and total time taken.

$\green{\boxed{\bf{Average\ Speed=\frac{Total\ Distance\ covered}{Total\ Time\ Taken}}}}$

Velocity

The change in position or displacement divided by the time interval is called velocity.

Acceleration

The rate of change of velocity is called acceleration.

Momentum

The product of mass and velocity of body at given time is called the momentum of body at that time.