Question

.A car moves in a straight line from rest at t=0. It accelerates with 2 m/s2 . Solve the

following table

Time 2 sec ? ? 10 min

Displacement ? ? 25 m ?

Velocity ? 10 m/s ? ?​

Answer 1

Given that ;

Initial velocity (u) = 0

Acceleration (a) = 2 m/s²

Displacement(s) = 25 m

We will use equation of motion :

v² - u² = 2as

⇒ v² - 0 = 2 * 2 * 25

⇒ v² = 100

⇒ v² = (10)²

⇒ v = 10 m/s

Hence, the velocity of the car is 10 m/s.

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Again, using equation of motion ;

v = u + at

⇒ 10 = 0 + 2 * t

⇒ 10 = 2t

⇒ t =

⇒ t = 5 secs

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Hence, the time take by car is 5 secs and the velocity acquired is 10 m/s.