If a car traveling at 20 m/s comes to a stop in 5 seconds, what is its decelerat
Practice Questions
Q1
If a car traveling at 20 m/s comes to a stop in 5 seconds, what is its deceleration?
2 m/s²
4 m/s²
5 m/s²
10 m/s²
Questions & Step-by-Step Solutions
If a car traveling at 20 m/s comes to a stop in 5 seconds, what is its deceleration?
Step 1: Identify the initial velocity of the car. The car is traveling at 20 m/s.
Step 2: Identify the final velocity of the car. Since the car comes to a stop, the final velocity is 0 m/s.
Step 3: Identify the time it takes for the car to stop. The car stops in 5 seconds.
Step 4: Use the formula for deceleration: a = (final velocity - initial velocity) / time.
Step 5: Plug in the values: a = (0 m/s - 20 m/s) / 5 s.
Step 6: Calculate the result: a = -20 m/s / 5 s = -4 m/s².
Step 7: Interpret the result. The negative sign indicates deceleration.
Deceleration – Deceleration is the rate at which an object slows down, calculated as the change in velocity over time.
Kinematics – Kinematics involves the study of motion without considering the forces that cause it, focusing on parameters like velocity, acceleration, and time.
