Question

answer it. class 7 TIME AND MOTION LESSON ​

Answer 1

$\huge \red \star \large \green \star \tiny \orange \star \huge \underline{ \boxed{ \red{ \frak{a}} \frak{ \orange{n} \blue{s} \pink{w} \green{e} \red{r}}}} \tiny \orange \star \large \green \star \huge \red \star$

✪ Speed :

• The rate at which a body moves
• How fast an object is moving.

➜ Speed is a scaler quantity

• SI unit of speed is m/s

✪ Relationship between distance and time as an equation :

$\large \red \looparrowright \bold{speed = \dfrac{distance}{time}}$

• For examples :

⍟ A car covers a distance of 36m in 3min. Find the speed of the car .

• Speed will be distance covered by the body in the given time .

SI unit of speed= meter per second

• 1 minute = 60seconds
• 3 minutes = 180 seconds

$\large \red \looparrowright \tt{speed = \dfrac{distance}{time}}$

$\\ \large \red \implies \sf \: speed = \frac{36}{180}$

$\\ \large \red \therefore \green{ \underline{ \boxed{\sf \pink{ \sf \: speed = 0.5m/s}}}}$