20 notecards = 5 pages (4 cards per page)
d. The rate of change of velocity
When velocity is positive and acceleration is negative, what happens to the objects motion?
a. the object slows down
Acceleration due to gravity is also called
c. free fall acceleration
A baseball catcher throws a ball vertically upward and catches it at the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time?
b. at the top of its trajectory
When there is no air resistance, objects of different mass
a. fall with equal acceleration with equal
Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt?
c. they would hit the ground at the same time
Which would fall with greater acceleration in a vacuum, a leaf or a stone?
c. they would accelerate at the same rate.
If an object has constant acceleration, its
b. velocity changes at a constant rate
When someone flies completely around the world:
c. they have traveled no total displacement
In a graph of displacement vs time, the slope of the line at any point:
b. is the velocity
The area under the velocity-time graph between any two time intervals is
a. the displacement.
A ball is thrown vertically upward near the surface of the Earth. While the ball is upward its acceleration is
c. opposite to its velocity
A ball is thrown vertically downward near the surface of the Earth. While the ball is going downward its acceleration is
b. in the same direction as its velocity
A ball is thrown vertically upward near the surface of the Earth. While the ball is at maximum altitude its acceleration is
e. opposite to its displacement
A racecar traveling in a straight line with a negative velocity experiences a positive acceleration. The speed of the racecar
A stone is thrown straight up and reaches a height H before falling back to the ground T seconds later. Its average velocity during the time T is
A ball is thrown upwards. After it has left the had its acceleration
a. remains constant
An object is dropped from rest. If it falls a distance s1 during the first second and an additional distance s2 during the next second, the ratio s2/s1 is
A stone is thrown straight up and reaches a height H before falling back down to ground T seconds later. Its average speed during the interval T is
A stone of mass m1 is dropped from the roof of a tall building. At the same instant, another stone of mass m2 is dropped from a window 10 m below the roof. The distance between the two stones during their flight
b. remains 10 m throughout.