Projectiles Question Preview (ID: 53678)


Projectiles. TEACHERS: click here for quick copy question ID numbers.

If a projectile launches from and lands at the ground, and has a HANGTIME of 4 seconds, what is its VERTICAL velocity when it hits the ground? (use -10 m/s2 for gravity concept)
a) -20 m/s
b) -40 m/s
c) -60 m/s
d) -80 m/s

If a projectile is launched from the ground at an initial velocity of 40 m/s, what speed does it return to the ground with?
a) -20 m/s
b) -40 m/s
c) -50 m/s
d) -60 m/s

What angle could you launch a projectile with that would give you the same distance (range) as one launched at 30 degrees? Neglect air resistance.
a) 15 degrees
b) 45 degrees
c) 60 degrees
d) 75 degrees

If we know the initial velocity and launch angle, what trig function would we use to find the vertical velocity component?
a) sine
b) cosine
c) tangent
d)

If we know both vertical and horizontal velocity components for a projectile, what trig function do we use to find the launch angle?
a) sine
b) cosine
c) tangent
d)

True/False Vertical and horizontal velocities are independent of each other for a projectile.
a) True
b) False
c)
d)

What is the vertical velocity at the peak of a projectile's path?
a) the same as the horizontal velocity
b) -9.8 m/s2
c) 0
d)

If one bullet is dropped at the same moment and the same height as another bullet that is fired horizontally from a gun, which one hits the ground first?
a) the bullet dropped hits first
b) the bullet fired hits first
c) they both hit the ground at the same time
d)

What angle would give the greatest launch distance, if all angles were launched at the same initial velocity?
a) 30 degrees
b) 45 degrees
c) 75 degrees
d) 90 degrees

What launch angle would give the greatest height for a projectile, if all initial velocities were equal?
a) 30 degrees
b) 45 degrees
c) 75 degrees
d) 90 degrees

Which velocity component remains constant for the path of a projectile?
a) vertical velocity
b) horizontal velocity
c) they both remain constant
d) neither remains constant

A projectile is fired horizontally from a height y above level ground. Which change would have resulted in a greater time of flight for the projectile? Neglect air resistance.
a) decreasing the mass of the projectile
b) lowering the height it is horizontally launched from
c) increasing the height it is horizontally launched from
d) decreasing the speed it is launched at

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