Question

A car acquires a velocity of 72 km /h in 10seconds starting from the rest.
find (a) the acceleration (b) the average speed (c) the distance traveled in this time.

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Answer 1

→ Hey User,

→ Given Question:-

→ A car acquires a velocity of 72 km /h in 10seconds starting from the rest.  find (a) the acceleration (b) the average speed (c) the distance traveled in this time.

→ To find:-

→ (a) the acceleration

→ (b) the average speed

→ (c) the distance traveled in this time

→ Answer:-

→ u = 0km/h

→ v = 72km/h

→ t = 10s

→ v = u  + at

→ 72 km / h  = a ( 10 )s

→ 72 × 5 / 18 × 1 / 10  = a

→  a = 2m/s²

→ (a) so , the acceleration is 2m/s².

→ Now,

→  v² - u² = 2as

→ ( 72 × 5 / 18 ) =

→ 2 × 2 × 5

→ s = 1 /4 ( 400)  =

→ 100m

→ vav = 100m/10s

→        = 10m/s  

→ (b) so , the average speed is 10m/s.

→ (c) so , the distance travelled in this time is :

→    s = 1/4 ( 400 )  = 100m

→ 100m

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Answer 2

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