What is the term used for the rate of change of velocity?
- Acceleration
- Acceleration measures how quickly an object’s velocity changes over time.
What is the SI unit of acceleration?
- Meter per second squared (m/s²)
- Acceleration is expressed in meters per second squared (m/s²) as it measures velocity change per unit time.
What is the acceleration of an object moving with uniform velocity?
- Zero
- If an object moves at constant velocity, its acceleration is zero since there is no change in velocity.
What kind of motion occurs when an object accelerates at a constant rate?
- Uniform acceleration
- Uniform acceleration means that velocity changes by equal amounts in equal time intervals.
Which type of motion has a variable rate of acceleration?
- Non-uniform acceleration
- Non-uniform acceleration occurs when the change in velocity is different for equal time intervals.
What is the acceleration of a freely falling body near Earth’s surface?
- 9.8 m/s²
- Objects in free fall experience an acceleration of 9.8 m/s² due to gravity.
Which equation represents acceleration in terms of initial and final velocity?
- (v – u) / t
- Acceleration is given by the formula a=v−uta = \frac{v – u}{t}a=tv−u, where vvv is final velocity, uuu is initial velocity, and ttt is time.
What is negative acceleration also called?
- Deceleration
- When an object slows down, it undergoes deceleration or negative acceleration.
What type of acceleration does a car have if it speeds up at a constant rate?
- Uniform acceleration
- If a car’s velocity increases at a steady rate, it experiences uniform acceleration.
What type of acceleration does an object experience if its velocity changes irregularly?
- Non-uniform acceleration
- When velocity changes in an unpredictable manner, the object undergoes non-uniform acceleration.
