Question

An object travels 40m in 10s & then another 40m in 15 s. what is the average speed of the object ​

Answer 1

ProvidEd that:

↪️ An object travels 40 m in 10 s

↪️ Then it travels another 40 m in 15 s

To calculate:

↪️ Average speed

Solution:

↪️ Average speed = 3.2 m/s

Using concepts:

• Formula to calculate average speed

• Formula to calculate total distance

• Formula to calculate total time taken

Using formulas:

• ${\small{\underline{\boxed{\sf{v \: = \dfrac{s}{t}}}}}}$

Where, v denotes average speed, s denotes total distance and t denotes total time

• ${\small{\underline{\boxed{\sf{Total \: distance \: = 1st \: distance \: + 2nd \: distance}}}}}$

• ${\small{\underline{\boxed{\sf{Total \: time \: = 1st \: time \: + 2nd \: time}}}}}$

Required solution:

~ Firstly let us calculate total distance!

→ Total distance = 1st distance + 2nd distance

→ Total distance = 40 + 40

→ Total distance = 80 metres

~ Now let's calculate total time

→ Total time = 1st time + 2nd time

→ Total time = 10 + 15

→ Total time = 25 seconds

~ Now let's calculate average speed!

$:\implies \sf Average \: speed \: = \dfrac{Total \: distance}{Total \: time} \\ \\ :\implies \sf v \: = \dfrac{s}{t} \\ \\ :\implies \sf v \: = \cancel{\dfrac{80}{25}} \\ \\ :\implies \sf v \: = 3.2 \: ms^{-1} \\ \\ :\implies \sf Average \: speed \: = 3.2 \: ms^{-1}$

Average speed is 3.2 m/s

Answer 2

Answer:-

Distances are

• 40m
• 40m

Times are

• 10s
• 15s

We know that

$\boxed{\sf Average\:Speed=\dfrac{Total\:Distance}{Total\:Time}}$

$\\ \rm\longmapsto Average\:Speed=\dfrac{40+40}{10+15}$

$\\ \rm\longmapsto Average\:Speed=\dfrac{80}{25}$

$\\ \rm\longmapsto Average\:Speed=3.2m/s$