1.

A car moves in a straight line from rest at t=0. It accelerates with 2m/s^2.Displacement= 25m, find time and velocity.

Answer»

Answer:

  • Time = 5 secs
  • Velocity = 10 m/s

Explanation:

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.

_______________________

Again, using equation of motion ;

v = u + at

⇒ 10 = 0 + 2 * t

⇒ 10 = 2t

⇒ t = \sf \dfrac{10}{2}

⇒ t = 5 secs

_______________________

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


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