Projectile Motion

Multiple Choice

In projectile motion, which of the following remains constant?

• Vertical velocity

• Horizontal velocity

• Vertical acceleration

• Horizontal acceleration

Open Ended

How does the video clip justify that horizontal motion of a projectile is independent of its vertical motion?

Multiple Choice

Which of the following equations represents the horizontal distance traveled by a projectile in motion, given initial velocity $$v_0$$ and time $$t$$ ?

• $$d = v_0 \cdot t$$

• $$d = \frac{1}{2} v_0 \cdot t^2$$

• $$d = v_0 \cdot t + \frac{1}{2} a \cdot t^2$$

• $$d = v_0^2 \cdot t$$

Multiple Choice

A plane traveling with a horizontal velocity of 100 m/s is 500 m above the ground. How long is the drop in the air?

• 5.1 seconds

• 10.1 seconds

• 15.1 seconds

• 20.1 seconds

Multiple Choice

What are the equations for the horizontal and vertical components of velocity for a projectile launched at an angle?

• v_ox = v_o cosθ

• v_oy = v_o sinθ

• v_ox = v_o sinθ

• v_oy = v_o cosθ

Multiple Choice

What is the equation for vertical displacement when a projectile begins and ends at ground level?

• y = 0

• y = v_0t + 0.5at^2

• y = v_xt

• y = v_yt

Multiple Choice

What is the initial horizontal velocity of a projectile launched with an initial velocity $$v_0$$ at an angle $$\theta$$ ?

• $$v_0 \cos(\theta)$$

• $$v_0 \sin(\theta)$$

• $$v_0 \tan(\theta)$$

• $$v_0 \cot(\theta)$$

Multiple Choice

How long is the ball in the air?

• 2.00 s

• 3.00 s

• 4.00 s

• 5.00 s

Multiple Choice

A ball is thrown upwards with a velocity of 15 m/s. How long does it take to reach its highest point? (Assume $$g = 9.8 \, \text{m/s}^2$$ )

• 1.5 s

• 2 s

• 2.5 s

• 3 s

Multiple Choice

A projectile is launched at an angle of 45 degrees with an initial speed of 30 m/s. What is the range of the projectile?

• 45 m

• 60 m

• 90 m

• 120 m

Multiple Choice

A projectile is launched at an angle of 60 degrees with an initial speed of 25 m/s. What is the maximum height reached by the projectile?

• 15.6 m

• 19.1 m

• 22.5 m

• 25.0 m

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident

Multiple Choice

Victor Velocity is standing on top of the roof of his house, firing stones with his slingshot over a level field. He is aiming straight outward, horizontally. If Victor pulls back harder on the sling to shoot a stone, which of the following quantities will be changed?

• The vertical displacement of the stone.

• The distance the stone travels, and the horizontal velocity.

• The time it takes the stone to strike the ground, and the horizontal velocity.