Question
Physics Question on Motion in a plane
Which of the following is true regarding projectile motion?
A
Horizontal velocity of projectile is constant
B
Vertical velocity of projectile is constant
C
Acceleration is not constant
D
Momentum is constant
Answer
Horizontal velocity of projectile is constant
Explanation
Solution
Horizontal velocity of a projectile is not affected by gravity. If a body is in the projectile motion, then its velocity can be resolved into horizontal and vertical components. And the body is subjected to the acceleration due to gravity (g), which is vertically downwards. Therefore horizontal component remains constant, while vertical component first decreases, becomes zero and then increases in the magnitude.