Understanding Acceleration

The video explains acceleration, the rate at which an object changes its speed. It covers factors affecting acceleration, such as speed change and time taken, and how to measure it using meters per second squared. The video also discusses constant and variable acceleration, illustrated with velocity-time graphs. Real-world examples include vehicles, elevators, and amusement rides. Common acceleration values are compared, highlighting the roller coaster's fast acceleration. The video concludes with a summary of key concepts.

Why do you feel pushed back into your seat when a car accelerates?

• Because the car is decelerating.

• Because the car is moving backward.

• Because the car is at a constant speed.

• Because the car is accelerating faster than your body.

What does acceleration refer to?

• The time it takes for an object to stop.

• The rate at which an object changes its speed.

• The distance an object travels.

• The weight of an object.

Which of the following factors affect acceleration?

• The color of the object.

• The change in speed and the time taken for the change.

• The temperature of the environment.

• The shape of the object.

How is acceleration measured?

• In meters per second squared.

• In kilometers per hour.

• In miles per hour.

• In feet per second.

What does a steeper line on a velocity-time graph indicate?

• Deceleration.

• Constant speed.

• Slower acceleration.

• Faster acceleration.

What is constant acceleration?

• When speed fluctuates randomly.

• When speed remains the same.

• When speed decreases at a constant rate.

• When speed increases at a constant rate.

How does a decreasing acceleration appear on a graph?

• As a straight line.

• As a zigzag line.

• As a downward curve.

• As an upward curve.

Which of the following is an example of acceleration in the real world?

• A person standing still.

• A stationary bicycle.

• A diver jumping off a cliff.

• A parked car.

What is the acceleration of a common hatchback car reaching 100 km/h in 6.7 seconds?

• 3.5 meters per second squared.

• 4.15 meters per second squared.

• 5.2 meters per second squared.

• 6.0 meters per second squared.

Which has the fastest acceleration: a Formula One car, a roller coaster, or a space shuttle?

• All have the same acceleration.

• Space shuttle.

• Roller coaster.

• Formula One car.