Linear Kinematics
At 3 s into a run, a football player is traveling at +3 m/s. Four seconds later, the player is traveling at -5 m/s. vf
is equal to
a. 0 m/s
b. 3 m/s
c. 5 m/s
d. -3 m/s
e. -5 m/s - correct answer e. -5 m/s
Velocity is calculated as
a. distance divided by time
b. displacement divided by time
c. force divided by time
d. force times distance
e. force divided by distance - correct answer b. displacement divided by time
Which type of motion describes the flight of a softball after it leaves the bat and sails in an arc over the outfield
fence?
a. linear motion
, b. curvilinear motion
c. angular motion
d. rectilinear motion
e. rectivcurvi motion - correct answer b. curvilinear motion
If an object's initial coordinates are (3, 5, 0), and the final coordinates are (6, -2, -4), what is the object's
displacement?
a. 3 units right, 3 units down, and 4 units forward
b. 3 units left, 7 units up, and 4 units forward
c. 9 units right, 7 units down, and 4 units backward
d. 3 units right, 7 units down, and 4 units backward
e. need more information to calculate - correct answer d. 3 units right, 7 units down, and 4 units backward
A softball is fouled off with a vertical velocity of 20 m/s and a horizontal velocity of 15 m/s. What is the
resultant velocity of the ball?
a. 20 m/s
b. 25 m/s
c. 30 m/s
d. 625 m/s
e. need more information to calculate - correct answer b. 25 m/s
A softball is hit at a 30° angle from horizontal. Its vertical velocity component is 40 mi/h. What is the resultant
velocity of the ball?
a. 20 mi/h
b. 40 mi/h
At 3 s into a run, a football player is traveling at +3 m/s. Four seconds later, the player is traveling at -5 m/s. vf
is equal to
a. 0 m/s
b. 3 m/s
c. 5 m/s
d. -3 m/s
e. -5 m/s - correct answer e. -5 m/s
Velocity is calculated as
a. distance divided by time
b. displacement divided by time
c. force divided by time
d. force times distance
e. force divided by distance - correct answer b. displacement divided by time
Which type of motion describes the flight of a softball after it leaves the bat and sails in an arc over the outfield
fence?
a. linear motion
, b. curvilinear motion
c. angular motion
d. rectilinear motion
e. rectivcurvi motion - correct answer b. curvilinear motion
If an object's initial coordinates are (3, 5, 0), and the final coordinates are (6, -2, -4), what is the object's
displacement?
a. 3 units right, 3 units down, and 4 units forward
b. 3 units left, 7 units up, and 4 units forward
c. 9 units right, 7 units down, and 4 units backward
d. 3 units right, 7 units down, and 4 units backward
e. need more information to calculate - correct answer d. 3 units right, 7 units down, and 4 units backward
A softball is fouled off with a vertical velocity of 20 m/s and a horizontal velocity of 15 m/s. What is the
resultant velocity of the ball?
a. 20 m/s
b. 25 m/s
c. 30 m/s
d. 625 m/s
e. need more information to calculate - correct answer b. 25 m/s
A softball is hit at a 30° angle from horizontal. Its vertical velocity component is 40 mi/h. What is the resultant
velocity of the ball?
a. 20 mi/h
b. 40 mi/h
