Review Projectiles

What variable letter is range?

• X
• Y
• V_x
• V_y

What variable letter is horizontal velocity?

• X
• Y
• V_x
• V_y

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion 

• increased
• remains constant 
• decreases
• increases then decreases

An object is launched horizontally from a cliff.  The time it takes to hit the ground is

• more than if it was just dropped
• less than if it was just dropped
• the same amount of time than if it was just dropped
• impossible to determine

A bullet is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?

• 0.52 s
• 0.27 s
• 0.13 s
• 0.36 s

Tags

NGSS.HS-PS2-4

What is the height of a horizontal projectile if it takes 3 seconds to hit the ground?

• 3.00 m
• 29.4 m
• 44.1 m
• 88.3 m

Tags

NGSS.HS-PS2-4

A rock is thrown horizontally from a cliff at 25 m/s. What will its horizontal and vertical velocities be after 2.0 s?

• v_x = 25 m/s; v_y = -9.8 m/s²

• v_x = 50 m/s; v_y = -19.6 m/s

• v_x = 50 m/s; v_y = -9.8 m/s

• v_x = 25 m/s; v_y = -19.6 m/s

A ball is projected horizontally with velocity ‘v’ m/s from a point 245 m above the ground.I f it strikes the ground 84 m horizontally from the point of projection, what is the value of v?

• 12 m/s

• 16.8 m/s

• 1.7 m/s

• 59 m/s

If you throw a baseball straight up, what is its velocity at the highest point?

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

The horizontal acceleration for a projectile is what value?

• 0 m/s²
• 9.8 m/s²
• 4.0 m/s²
• 8.1 m/s²