Projectile Motion Quiz 2

INSTRUCTIONS: Submit your answers to this quiz by email to melitabsarigumba@yahoo.com

1. At what part of its trajectory does a projectile have minimum speed?

the instant it is thrown
half-way to the top
at the top of its path
at the instant it hits the ground

2. A bullet is fired horizontally with a velocity of 1000. m/s. Neglecting air resistance, at the end of 1.0 s, how far is the bullet from the muzzle?

1000. m horizontally and 4.90 m vertically
1000. m horizontally
1000. m horizontally and 1000. m vertically
1000. m

3. Which statement is not true about a projectile fired at an angle other than 90^° from the ground and air resistance is not a factor?

the time to reach the highest point is the same as the time to fall to the ground
the initial vertical velocity is equal to the final vertical velocity, but in the opposite direction
the horizontal velocity does not change
the maximum range occurs when fired at a 45^° angle
at the highest point of its trajectory, both horizontal and vertical velocities are equal to zero

Neglecting air resistance, a horizontally fired projectile maintains its horizontal component of velocity because:

it is not acted upon by any forces
it is not acted upon by any horizontal forces
it has no initial vertical component of velocity
the net force acting on it is zero