#5 Displacement and Gravitational Acceleration
Now, the object mentioned in #4 is tossed upward with an initial velocity of +24.5 m/s.
What is the net displacement?
A. -307 meters
B. -165 meters
C. -22.7 meters
D. 22.7 meters
#6 Calculating Average Velocity
A rocket accelerates uniformly, and has an initial velocity of -6.3 m/s and a final velocity of +6.3 m/s. What is the average velocity of the rocket over the time interval?
A. 17.3 m/s
B. 12.6 m/s
C. -12.6 m/s
D. 0.0 m/s
#7 Calculating Average Velocity
A baseball undergoes uniform acceleration. The average velocity of the baseball is 32 m/s. If the final velocity of the baseball is 0.0 m/s, what is its initial velocity?
A. 32 m/s
B. 64 m/s
C. -64 m/s
D. -32 m/s
#8 Initial Velocity Subtleties
In the presence of gravitational acceleration, two balls are released from the same height above a surface. Neglect air resistance. The first ball is tossed upward with a velocity +v0, and the second ball is tossed downward with a velocity -v0. How do the speeds of the two balls compare immediately before striking the surface?
A. The first ball has the lowest speed, followed by the second ball.
B. The second ball has the lowest speed followed by the first ball.
C. Both balls have the same speed on striking the surface.
D. The answer depends on the specific height above the surface