Understanding Acceleration

The video tutorial explains the concept of acceleration, highlighting that it occurs when there is a change in speed or direction. It compares the acceleration experienced in a truck versus a sports car, demonstrating how acceleration is calculated using the change in velocity over time. The tutorial also covers how acceleration can be positive or negative, affecting velocity differently. It concludes with a review of the key points and encourages viewers to explore more physics topics.

What happens to acceleration when a car travels at a constant speed in a straight line?

• Acceleration is zero

• Acceleration decreases

• Acceleration increases

• Acceleration fluctuates

Which vehicle experiences greater acceleration: a truck going from 0 to 60 m/s in 10 seconds or a sports car doing the same in 5 seconds?

• The sports car

• The truck

• Neither experiences acceleration

• Both experience the same acceleration

How is acceleration calculated?

• Time divided by change in velocity

• Change in speed divided by distance

• Final speed minus initial speed

• Change in velocity divided by time

What is the term for speed with direction?

• Acceleration

• Velocity

• Impulse

• Momentum

If a car turns at a constant speed, is it accelerating?

• No, because the speed is constant

• Yes, because the speed changes

• No, because the direction is constant

• Yes, because the direction changes

What does a positive acceleration indicate about velocity?

• Velocity is zero

• Velocity is increasing

• Velocity is constant

• Velocity is decreasing

What does a negative acceleration mean for a vehicle's velocity?

• Velocity becomes zero

• Velocity remains unchanged

• Velocity is decreasing

• Velocity is increasing

If a vehicle's initial velocity is 20 m/s and it has a negative acceleration of 6 m/s², what will its velocity be after 1 second?

• 26 m/s

• 14 m/s

• 8 m/s

• 20 m/s

What are the two conditions that result in acceleration?

• Constant speed or constant direction

• Constant speed or change in direction

• Change in speed or constant direction

• Change in speed or change in direction

What happens to velocity when acceleration is negative?

• Velocity becomes zero

• Velocity increases

• Velocity decreases

• Velocity remains constant