Question 3
- A projectile is fired at an angle, to the horizontal with velocity, u. Show that at any time, t, during the motion, the:
The horizontal component of the velocity is independent of t;
The vertical component of the velocity depends on t.
2. State the assumption on which projectile motion is based
Observation
In 3(a), many candidates gave the vertical component as instead of since motion is against gravity.
In 3(b), only a few candidates could state the assumption on which projectile motion is based correctly.
EXPECTED RESPONSES:
(a) Horizontal and vertical components of velocity
(b) Assumption