Understanding Acceleration and Velocity

The video tutorial explains acceleration as the rate of change of velocity, highlighting its vector nature and SI unit (m/s²). It introduces the formula a = (v-u)/t, where 'v' is final velocity, 'u' is initial velocity, and 't' is time. The concept of deceleration is discussed as a specific case of acceleration where velocity decreases. The tutorial also covers constant velocity, emphasizing that both magnitude and direction must remain unchanged. Finally, it explains that any change in velocity, whether in magnitude or direction, results in acceleration.

What is the SI unit of acceleration?

• Meters per second squared

• Miles per hour

• Meters per second

• Kilometers per hour

Acceleration is defined as:

• The rate of change of direction

• The rate of change of distance

• The rate of change of velocity

• The rate of change of speed

What is the formula for acceleration?

• a = u + v / t

• a = v - u / t

• a = v + u / t

• a = u - v / t

Which of the following is true about acceleration?

• It is a scalar quantity

• It has only magnitude

• It is a vector quantity

• It has no direction

Which of the following best describes deceleration?

• Change in direction

• Constant velocity

• Decrease in velocity

• Increase in velocity

What is the difference between acceleration and deceleration?

• Deceleration can be an increase or decrease in velocity, while acceleration is only a decrease

• Deceleration is only an increase in velocity

• Acceleration is only an increase in velocity

• Acceleration can be an increase or decrease in velocity, while deceleration is only a decrease

For an object to have constant velocity, what must remain unchanged?

• Only direction

• Only speed

• Neither speed nor direction

• Both speed and direction

If an object moves in a circular path at a constant speed, what can be said about its velocity?

• Speed is changing

• Velocity is changing

• Direction is constant

• Velocity is constant

What happens to velocity when only the direction changes?

• Speed decreases

• Velocity changes

• Velocity remains constant

• Speed increases

What must change for an object to experience acceleration?

• Only speed

• Only direction

• Either speed or direction

• Neither speed nor direction