Question

QUESTION 1

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

   		decrease the launch angle and decrease the ball’s initial speed
   		increase the launch angle and decrease the ball’s initial speed
   		decrease the launch angle and increase the ball’s initial speed
   		increase the launch angle and increase the ball’s initial speed

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 highest point?   

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

10.00000 points   

QUESTION 3

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

   		13°
   		27°
   		63°
   		75°

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QUESTION 4

1. If the metallic ball is propelled with an initial velocity of 60. m/s at 37° above the horizontal. The horizontal component of the golf ball’s initial velocity is

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

10.00000 points   

QUESTION 5

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

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

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 projectile is in flight, the acceleration…….

   		increases
   		decreases
   		is maximum
   		is constant

10.00000 points   

QUESTION 7

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

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

10.00000 points   

QUESTION 8

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

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

Answer 1