A black paper absorbs light of all the colours and reflects none.

Question

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Answer 1

From conversion from $m s^{- 1}$ to $k m h^{- 1}$ we get,
As $1 k m = 1000 m$ and $1 h r = 3600 s e c$

5 $m s^{- 1}$ = $\frac{5 m}{s e c}$ = $\frac{5 \times 1 0 ^{- 3} k m}{1 / 3 6 0 0 h r}$ = $0.005 \times 3600$ = $18 k m h^{- 1}$
Hence,the speed 5 $m s^{- 1}$ is less than 25 km $h^{- 1}$ .

Answer 2

From conversion from

m s^{- 1}

to

k m h^{- 1}

we get,

As

1 k m = 1000 m

and

1 h r = 3600 s e c

5

m s^{- 1}

=

\frac{5 m}{s e c}

=

\frac{5 \times 1 0 ^{- 3} k m}{1 / 3 6 0 0 h r}

=

0.005 \times 3600

=

18 k m h^{- 1}

Hence,the speed 5

m s^{- 1}

is less than 25 km

h^{- 1}

.

A black paper absorbs light of all the colours and reflects none.

True

False

From conversion from $m s^{- 1}$ to $k m h^{- 1}$ we get,
As $1 k m = 1000 m$ and $1 h r = 3600 s e c$

5 $m s^{- 1}$ = $\frac{5 m}{s e c}$ = $\frac{5 \times 1 0 ^{- 3} k m}{1 / 3 6 0 0 h r}$ = $0.005 \times 3600$ = $18 k m h^{- 1}$
Hence,the speed 5 $m s^{- 1}$ is less than 25 km $h^{- 1}$ .

The speed of a car is $72 k m h^{- 1}$ . Express it in $m / s$ .

Arrange the following speeds in increasing order (keeping the least speed first):
1. An athlete running with a speed of $10 m / s$ .
2. A bicycle moving with a speed of $200 m / m i n$ .
3. A scooter moving with a speed of $30 k m / h$ .

Arrange the following speeds in increasing order:
$10 ms^{- 1}, 1 km min^{- 1}, 18 km h^{- 1}$

Change the speed of $6 m / s$ into $k m / h$

Express $15 m / s$ in $k m / h$ .

Revise with Concepts

Speed

Understanding Uniform and Non-Uniform Motion

Basic Introduction to Velocity

Average Speed and Average Velocity

Instantaneous Velocity and Instantaneous Speed

Velocity - Time Graph

A black paper absorbs light of all the colours and reflects none.

True

False

From conversion from ms−1 to kmh−1 we get,As 1km=1000m and 1hr=3600sec 5 ms−1 =sec5m​= 1/3600hr5×10−3km​=0.005×3600 =18kmh−1Hence,the speed 5 ms−1 is less than 25 km h−1.

The speed of a car is 72 kmh−1. Express it in m/s.

Arrange the following speeds in increasing order (keeping the least speed first): 1. An athlete running with a speed of 10m/s. 2. A bicycle moving with a speed of 200m/min. 3. A scooter moving with a speed of 30km/h.

Arrange the following speeds in increasing order: 10 ms−1,1 km min−1,18 km h−1

Change the speed of 6 m/s into km/h

Express 15 m/s in km/h.

Revise with Concepts

Speed

Understanding Uniform and Non-Uniform Motion

Basic Introduction to Velocity

Average Speed and Average Velocity

Instantaneous Velocity and Instantaneous Speed

Velocity - Time Graph

From conversion from $m s^{- 1}$ to $k m h^{- 1}$ we get,
As $1 k m = 1000 m$ and $1 h r = 3600 s e c$

5 $m s^{- 1}$ = $\frac{5 m}{s e c}$ = $\frac{5 \times 1 0 ^{- 3} k m}{1 / 3 6 0 0 h r}$ = $0.005 \times 3600$ = $18 k m h^{- 1}$
Hence,the speed 5 $m s^{- 1}$ is less than 25 km $h^{- 1}$ .

The speed of a car is $72 k m h^{- 1}$ . Express it in $m / s$ .

Arrange the following speeds in increasing order (keeping the least speed first):
1. An athlete running with a speed of $10 m / s$ .
2. A bicycle moving with a speed of $200 m / m i n$ .
3. A scooter moving with a speed of $30 k m / h$ .

Arrange the following speeds in increasing order:
$10 ms^{- 1}, 1 km min^{- 1}, 18 km h^{- 1}$

Change the speed of $6 m / s$ into $k m / h$

Express $15 m / s$ in $k m / h$ .