Projectile Motion

At which of the following places does a projectile have the greatest acceleration?

• At the peak of its trajectory

• Half way to the peak

• At the instant it is launched

• All points have the same acceleration

The acceleration during the whole trip, on the horizontal component, is always...

• 0 m/s²

• 3.6 m/s²

• 5 m/s²

• -9.8 m/s²

Tags

NGSS.MS-PS2-2

The final velocity on the highest point is...

• 2.1 m/s

• positive

• 0 m/s

• negative

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

If the time to get to the highest point is 2.6 s, what would be the total time in the air?

• 2.6 s

• 3.8 s

• 5.2 s

• 4.9 s

In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. 

• True

• False

• Sometimes true

• Sometimes false

An object in free fall is also called

• gravity

• projectile motion

• projectile

• tide

Tags

NGSS.MS-PS2-4

A plane flying horizontally at 120 m/s drops a crate. When the crate strikes the ground 15 seconds later, what is the magnitude of the horizontal component of its velocity?

• 147 m/s

• 120 m/s

• 1800 m/s

• 8 m/s

In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves. 

• True

• False

• Sometimes true

• Sometimes false

Which of the following would NOT be considered a projectile? 

• a cannonball thrown straight up

• a cannon ball rolling down a slope

• a cannonball rolling off a table

• a cannonball thrown in the air

An outfielder throws a baseball to second base at a speed of 19.6 m/s and an angle of 30° above the horizontal.

Which pair represents the initial horizontal velocity (v_x ) and initial vertical velocity (v_y ) of the baseball?

• v_x = 17.0 m/s and v_y = 9.80 m/s

• v_x = 9.80 m/s and v_y = 17.6 m/s

• v_x = 19.4 m/s and v_y = 5.90 m/s

• v_x = 5.90 m/s and v_y = 19.4 m/s