Question

A car starts from rest and accelerates uniformly for 8.0 seconds . It reaches a final speed of 16 m/s. What is the average velocity of the car?​

Answer 1

Answer:

Given that

Initial velocity=0

Final velocity=16m/s

Average velocity of car=Initial velocity +final velocity/2

=0+16/2

=16/2m/s

=8m/s.

Answer 2

☘️ Given :

• Initial Velocity (u) = 0 m/s
• Final velocity (v) = 16 m/s
• Time taken (t) = 8 s

______________________

☘️ Solution :

Acceleration :

• Formula: v = u + at

→ 16 = 0 + a × 8

→ 16 = 0 + 8a

→ 16 = 8a

→ 8a = 16

→ a = 16/8

→ a = 2

.°. The acceleration = 2 m/s²

Distance covered :

• Formula: v² - u² = 2as

→ (16)² - (0)² = 2 × s

→ 256 - 0 = 2s

→ 2s = 256

→ s = 256/2

→ s = 128

.°. the distance covered = 128 m

Average speed :

• Formula: Average speed = Total distance/Total time

→ 128/8

→ 16

.°. the average speed is 16 m/s.

______________________

☘️ Answer :

• The average speed = 16 m/s.