CakeMinty CakeMinty

30-11-2018
Physics

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PLEASE HELP!! PHYSICS QUIZ!

1) A projectile has a vertical component and a horizontal component.
True
False

2) The shape of a projectile's trajectory is an ellipse.
True
False

3) During the course of trajectory, the horizontal component of the velocity is
A) constant
B) increasing
C) decreasing
D) negative

Respuesta :

ariston ariston

06-12-2018

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.

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