During projectile motion, what is the acceleration in the horizontal direction?

Zero


Velocity is constant in the horizontal direction during projectile motion.

Answer in your head, out loud, or on paper, then tap the card to flip.

During projectile motion, when is the vertical component of velocity zero?

At the highest point.

Answer in your head, out loud, or on paper, then tap the card to flip.

Is projectile motion in air affected by gravity?

Only the vertical motion is affected by gravity.


Gravity provides a constant downwards acceleration of 9.81 ms-2. 

The velocity in the horizontal direction is constant.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the acceleration in the vertical direction during projectile motion through air?

Downwards acceleration of 9.81 ms-2 due to gravity.

Answer in your head, out loud, or on paper, then tap the card to flip.

A ball is launched at an angle to the horizontal. 

At what launch angle will the range be the greatest?

45°

Answer in your head, out loud, or on paper, then tap the card to flip.

A ball is launched at 5 ms-1 at an angle of 30° to the horizontal. 

What is the initial vertical component of the velocity?

sin(30) = hypotenuseopposite​ = 5vertical component​

 

vertical component = 5 sin(30) = 2.5 ms−1

Answer in your head, out loud, or on paper, then tap the card to flip.

A ball is launched at 5 ms-1 at an angle of 30° to the horizontal. 

What is the initial horizontal component of the velocity?

cos(30) = hypotenuseadjacent​ = 5horizontal component​

 

horizontal component = 5 cos(30)= 4.33 ms−1

Answer in your head, out loud, or on paper, then tap the card to flip.