Projectile motion

When a projectile is at maximum height

• the vertical velocity is max and the acceleration is zero

• the vertical velocity is max and the acceleration is g

• the vertical velocity is zero and the acceleration is zero

• the vertical velocity is zero and the acceleration is g

Air resistance would

• not change the range

• increase the range

• reduce the range

• half the range

The horizontal component of a projectile's velocity

• increases by g

• decreases by g

• remains constant

• is zero unless the projectile is launched vertically

The range of a projectile depends on

• the launch angle

• the initial velocity

• the launch height

• all of the above

Maximum range is achieved with a launch angle of

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees

A projectile launched from the ground at 30 degrees takes 0.5 s to reach maximum height. Total time airborne will be

• 0.5 s

• 0.8 s

• 0.9 s

• 1.0 s

If a projectile is launched horizontally from a cliff, the time to reach the ground is determined by

• the mass of the object

• the launch angle

• the height of the cliff

• the initial velocity

The vertical component of the initial velocity is

• u sin theta

• u cos theta

• always maximum at max height

• always minimum at launch

If a projectile is launched at 60 degrees with an initial velocity of 6 m/s the horizontal velocity is

• 6 m/s

• zero at maximum altitude

• 6sin60

• 6cos60