Question

question 3
the path of a projectile is called a...
straight line
parabola
parallel
vector component
question 4
which of the following correctly describes the horizontal and vertical motion of an object projected horizontally with a speed, v, from a height, h?
constant speed for both horizontal and vertical
constant speed for horizontal, acceleration for vertical
acceleration for both horizontal and vertical
acceleration for horizontal, constant speed for vertical

Explanation:

Question 3

When a projectile is launched, its path is a parabola. This is because the horizontal motion (constant - velocity, assuming no air resistance) and vertical motion (accelerated due to gravity) combine to form a parabolic trajectory. A straight - line is incorrect as there is vertical acceleration. Parallel is a geometric relationship and not related to the path of a projectile. A vector component is a part of a vector and not the path.

For a horizontally - projected object:

• In the horizontal direction, if we neglect air resistance, there is no force acting on the object in the horizontal direction. According to Newton's first law (\(F = ma\), and \(F_x=0\)), the horizontal acceleration \(a_x = 0\), so the horizontal velocity \(v_x\) is constant.
• In the vertical direction, the only force acting on the object is the force of gravity (\(F_y=-mg\)). Using \(F = ma\), we get \(a_y=-g\) (acceleration due to gravity, constant). So there is a constant acceleration in the vertical direction.

Answer:

parabola

Question 4