Projectile Motion

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

• 9.8 m/s²

• 0 m/s²

• 9.8 m/s

• 0 m/s

What is the horizontal acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

What is the vertical acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first?

• Shot Bullet

• Hit at Same Time

• Dropped Bullet

Which best describes the horizontal motion of a projectile, assuming no air resistance?

• Acceleration of 9.8 m/s²

• An increasing acceleration every second

• Acceleration of 5 m/s²

• Constant velocity

A soccer ball is kicked horizontally off a cliff. What information is needed to find the time to fall?

• The height of the cliff

• The mass of the ball

• The initial speed of the ball

• All of these

A cannon is fired horizontally from a 5.0 m tall tower. How much time will it take until the projectile hits the ground?

**d_y = 4.9t²

• 0.5 s

• 2.0 s

• 1.0 s

• 5.0 s

What is the relationship between motion in the x and y-dimensions?

• If x is greater, then y is greater

• If x is greater, then y is less

• There is no relationship; independent

A cannonball is launched horizontally at 50 m/s from an 80 m tall cliff. How far will it go (horizontally) before hitting the ground? d_y = 4.9t^{2 and} d_x = v . t

• 100 m

• 400 m

• 200 m

• 800 m

Which of the following would NOT be considered a projectile?

• a cannonball thrown straight up

• a cannonball rolling off a table

• a cannon ball rolling down a slope

• a cannonball thrown in the air