Summary

• Vectors
• Vector components
• Projectiles

• Written Quiz   Timer
  
  
• Projectile motion example questions



Example #1 Example #2 Example #3 Example #4 Example #5

klm
Aaron Rodgers is playing football in a vacuum where g = 10 m/s². He throws a pass with an initial speed of 15 m/s up and 20 m/s south (downfield). After how much time does the football reach its peak?
A. 1.0 s
B. 1.5 s
C. 2.0 s
D. 3.0 s
Answer















klm
What is the ball's velocity at its peak?
A. zero
B. 10 m/s down
C. 20 m/s south
D. 30 m/s south
Answer















klm
What is the acceleration of the ball at its peak?
A. zero
B. 10 m/s² down
C. 10 m/s² south
D. 10 m/s² down & south
Answer















klm
What height does the ball reach above the field?
A. 7.5 m
B. 11.3 m
C. 15 m
D. 22.5 m
Answer















klm
How far downfield does the ball travel?
A. 20 m
B. 30 m
C. 60 m
D. 180 m
Answer















 



B. 1.5 s





















 



C. 20 m/s south

The vertical component of the velocity is zero but the horizontal component remains the same throughout the flight.




















 



B. 10 m/s² down

The acceleration remains constant throughout the flight: always 10 m/s², always downward.




















 



B. 11.3 m





















 



C. 60 m