Acceleration
What is the definition of acceleration?
A) The rate of change of displacement
B) The rate of change of time
C) The rate of change of velocity
D) The total distance traveled
C) The rate of change of velocity
A runner’s velocity increases from 0 to 8 m/s in 4 seconds. What is her acceleration?
A) 0.5 m/s²
B) 1.5 m/s²
C) 2 m/s²
D) 4 m/s²
C) 2 m/s² ✅
If the slope of a velocity vs. time graph is zero, what does that mean?
A) The object is speeding up
B) The object is moving with constant velocity
C) The object is slowing down
D) The object is stationary
B) The object is moving with constant velocity ✅
Which of the following best describes free fall near Earth’s surface?
A) Constant velocity
B) Constant acceleration of 9.8 m/s²
C) Decreasing acceleration
D) Acceleration of 0 m/s²
B) Constant acceleration of 9.8 m/s² ✅
The greater the slope of a velocity vs. time graph, the:
A) Smaller the acceleration
B) Greater the acceleration
C) Slower the object moves
D) Longer the time interval
B) Greater the acceleration ✅
A car speeds up from 4 m/s to 10 m/s in 3 seconds. What is its average acceleration?
A) 2 m/s²
B) 3 m/s²
C) 6 m/s²
D) 14 m/s²
A) 2 m/s²
If an object’s acceleration is zero, what must be true?
A) The object is stopped
B) The object’s velocity is constant
C) The object is accelerating negatively
D) The object’s direction is changing
B) The object’s velocity is constant ✅
What kind of line represents constant acceleration on a velocity vs. time graph?
A) A straight, sloping line
B) A curved line
C) A horizontal line
D) A zig-zag line
A) A straight, sloping line ✅
A car moving north slows down. What is the direction of its acceleration?
A) North
B) South
C) East
D) West
B) South ✅
A car starts from rest and accelerates uniformly to 30 m/s in 10 seconds. What is its acceleration?
A) 2.5 m/s²
B) 3.0 m/s²
C) 1.5 m/s²
D) 5.0 m/s²
B) 3.0 m/s² ✅
What does a negative acceleration indicate?
A) The object is slowing down
B) The object is speeding up
C) The object is at rest
D) The object is moving backward
The object is slowing down ✅
Which of these represents deceleration?
A) A car moving from rest to 25 m/s
B) A ball dropped from a height
C) A car coming to a stop
D) A plane taking off
C) A car coming to a stop ✅
A positive slope on a velocity vs. time graph indicates:
A) Constant velocity
B) Positive acceleration
C) Negative acceleration
D) The object is stopped
B) Positive acceleration ✅
A car’s velocity changes from 20 m/s to 0 m/s in 5 seconds. What is its acceleration?
A) 2 m/s²
B) –4 m/s²
C) –2 m/s²
D) +4 m/s²
B) –4 m/s² ✅
What is the acceleration of an object that is subject only to the force of gravity; near Earth’s surface this acceleration is 9.80 m/s2?
acceleration due to gravity
average acceleration
constant acceleration
instantaneous acceleration
acceleration due to gravity
On a velocity vs. time graph, what does the slope represent?
A) Speed
B) Acceleration
C) Displacement
D) Time
B) Acceleration ✅
A ball slows from 6 m/s to 2 m/s in 2 seconds. Its acceleration is:
A) +2 m/s²
B) –2 m/s²
C) –4 m/s²
D) +4 m/s²
B) –2 m/s² ✅
A negative slope on a velocity vs. time graph means:
A) Speeding up in the positive direction
B) Constant negative acceleration
C) Stopped motion
D) Changing reference frame
B) Constant negative acceleration ✅
When velocity and acceleration have opposite signs, the object is:
A) Speeding up
B) Slowing down
C) Changing direction
D) Not moving
B) Slowing down ✅
What is the change in velocity divided by the time interval over which it changed
negative acceleration
average acceleration
constant acceleration
instantaneous acceleration
average acceleration
A constant acceleration means that:
A) Velocity changes equally in equal time intervals
B) Velocity stays constant
C) Acceleration increases with time
D) The object is not moving
A) Velocity changes equally in equal time intervals ✅
The SI unit for acceleration is:
A) m/s
B) m/s²
C) N/kg
D) km/h
B) m/s² ✅
The area under a velocity vs. time graph represents:
A) Acceleration
B) Displacement
C) Velocity
D) Time
B) Displacement ✅
Which situation describes zero acceleration?
A) A car cruising at 60 km/h on a straight road
B) A ball dropped from a building
C) A car turning a corner
D) A rocket launching
A car cruising at 60 km/h on a straight road ✅
What is the rate of change of velocity at a specific instant in time?
constant acceleration
instantaneous acceleration
negative acceleration
instantaneous acceleration