1.
Answer: True
Explanation: A projectile is launched at certain angle with the horizontal. Hence, its equation of motion can be described using vertical and horizontal components. Therefore, the statement is true.
2.
Answer: False
Explanation:
The shape of the trajectory of a projectile is parabola. Hence, the given statement is false.
3.
Answer: A) constant
Explanation: During the course of trajectory, the horizontal component of the velocity is constant. There is no external force acting in the horizontal direction. In the vertical direction, acceleration due to gravity acts which increases the vertical component of velocity. Hence, the correct option is A.
