Acceleration Flashcards
(26 cards)
What is acceleration?
Acceleration is the rate of change of velocity of an object with respect to time.
True or False: Acceleration can be negative.
True
Fill in the blank: Acceleration is measured in _____ per second squared.
meters
What is the formula for calculating acceleration?
Acceleration (a) = (final velocity - initial velocity) / time
What unit is commonly used to express acceleration?
Meters per second squared (m/s²)
If an object is moving at a constant velocity, what is its acceleration?
Zero
What is the acceleration of an object in free fall near the Earth’s surface?
Approximately 9.81 m/s²
True or False: An object can accelerate even if its speed is constant.
True
What is the term for acceleration that is directed towards the center of a circular path?
Centripetal acceleration
Fill in the blank: The acceleration due to gravity is approximately _____ m/s².
9.81
What does a positive acceleration indicate?
An increase in the speed of an object.
What does a negative acceleration indicate?
A decrease in the speed of an object, often referred to as deceleration.
In the equation a = (v_f - v_i) / t, what does v_f represent?
Final velocity
In the equation a = (v_f - v_i) / t, what does v_i represent?
Initial velocity
What is uniform acceleration?
Acceleration that remains constant over time.
True or False: Acceleration can occur in a straight line only.
False
What type of graph can be used to represent acceleration?
Velocity vs. time graph
What does the slope of a velocity-time graph represent?
Acceleration
If an object accelerates from rest to a speed of 20 m/s in 4 seconds, what is its acceleration?
5 m/s²
What is the effect of friction on acceleration?
Friction generally reduces the acceleration of an object.
What is the relationship between mass and acceleration according to Newton’s second law?
Acceleration is inversely proportional to mass for a given force.
Fill in the blank: The greater the net force applied to an object, the greater the _____ produced.
acceleration
What is the acceleration of an object that moves at a constant speed on a straight path?
Zero
True or False: An object can have acceleration while moving at a constant speed if it changes direction.
True
