A car accelerates from rest to 20 m/s in 5 seconds. What is the average accelera

₹0.0

Question: A car accelerates from rest to 20 m/s in 5 seconds. What is the average acceleration?

Options:

Correct Answer: 4 m/s²

Solution:

Average acceleration is calculated as (final velocity - initial velocity) / time = (20 m/s - 0 m/s) / 5 s = 4 m/s².

A car accelerates from rest to 20 m/s in 5 seconds. What is the average acceleration?

A car accelerates from rest to 20 m/s in 5 seconds. What is the average acceleration?

Correct Answer: 4 m/s²

Step 1: Identify the initial velocity of the car. Since the car starts from rest, the initial velocity is 0 m/s.
Step 2: Identify the final velocity of the car. The final velocity is given as 20 m/s.
Step 3: Identify the time taken for the acceleration. The time is given as 5 seconds.
Step 4: Use the formula for average acceleration, which is (final velocity - initial velocity) / time.
Step 5: Substitute the values into the formula: (20 m/s - 0 m/s) / 5 s.
Step 6: Calculate the difference in velocity: 20 m/s - 0 m/s = 20 m/s.
Step 7: Divide the difference in velocity by the time: 20 m/s / 5 s = 4 m/s².
Step 8: The average acceleration of the car is 4 m/s².

Average Acceleration – Average acceleration is the change in velocity divided by the time taken for that change.
Kinematics – Understanding the basic equations of motion and how they relate to velocity, acceleration, and time.