QUESTION 1

1. If the metallic ball is launched at an angle of 25° above thehorizontal at a speed of 14 m/s. The ball returns to level ground.Which combination of changes must produce an increase in time offlight of a second launch?

   		decrease the launch angle and decrease the ball’s initialspeed
   		increase the launch angle and decrease the ball’s initialspeed
   		decrease the launch angle and increase the ball’s initialspeed
   		increase the launch angle and increase the ball’s initialspeed Â

10.00000 points   

QUESTION 2

1. If the metallic ball is thrown vertically upward into the air.What is the instantaneous acceleration of the ball at its highestpoint?   

   		changing from 9.8 m/s2 up to 9.8 m/s2 down
   		9.8 m/s2 up. Â
   		9.8 m/s2 down. Â
   		zero. Â

10.00000 points   

QUESTION 3

1. A projectile is fired with an initial velocity of 120.0 m/s atan angle, θ, above the horizontal. If the projectile’s initialhorizontal speed is 55 meters per second, then angle θ measuresapproximately

   		13°
   		27°
   		63° Â
   		75°

10.00000 points   

QUESTION 4

1. If the metallic ball is propelled with an initial velocity of60. m/s at 37° above the horizontal. The horizontal component ofthe golf ball’s initial velocity is

   		30. m/s
   		40 m/s
   		48 m/s  Â
   		36 m/s

10.00000 points   

QUESTION 5

1. A projectile is thrown with an initial velocity of 100 m/s northis given an acceleration of 10 m/s2 south. What will its velocitybe after 6.0 s?
   

   		60 m/s north
   		40 m/s north
   		40 m/s south
   		60 m/s south Â

10.00000 points   

QUESTION 6

1. A projectile is fired at an angle of 45° above the horizontal.Assume that air resistance is not significant. While the projectileis in flight, the acceleration…….

   		increases Â
   		decreases
   		is maximum
   		is constant

10.00000 points   

QUESTION 7

1. If the metallic ball is shot with an initial velocity of 10meters per second at an angle of 30.° above the horizontal. Themagnitude of the horizontal component of the ball’s initialvelocity is

   		9.8 m/s
   		8.7 m/s Â
   		5.0 m/s
   		10 m/s

10.00000 points   

QUESTION 8

1. If the metallic ball is thrown straight down with an initialvelocity of 50 m/s. (g = 10 m/s2 down). After 2.0 s the magnitudeof its velocity is:

   		70  m/s
   		62  m/s
   		110 m/s
   		30  m/s
   		2.5 m/s