Question

velocity of a car started from rest reaches

24 m/s in 4s.what are the initial velocity and
the final velocity of the car? Calculate its
acceleration?
​

Answer 1

Given :-

• Velocity of a car started from rest reaches 24 m/s in 4s

To find :-

• Initial velocity ?
• Final velocity ?
• Acceleration ?

Solution :-

• Initial velocity = 0 {started from rest}

• Final velocity = 24 m/s

• Time = 4s

According to first equation of motion

• → v = u + at

• Where " v " is final velocity, " u " is initial velocity, " a " is acceleration and " t " is time taken.

Put the values:-

→ 24 = 0 + a × 4

→ 24 = 4a

→ a = 24/4

→ a = 6 m/s²

Hence,

• Acceleration of car is 6 m/s²

More to know:-

s = ut + at² { second equation of motion }

v² = u² + 2as { Third equation of motion }

• Negative value of acceleration is known as retardation

Answer 2

Answer:

If the car starts from rest then intial velocity is 0 and acceleration is 6 m/s 2.