Horizontal and Vertical Motion of a Projectile

What is the vertical acceleration of the ball after one second after a baseball is thrown horizontally? 

• 0

• 1 m/s²

• 9.8 m/s²

• -9.8 m/s²

Which of the following statements is NOT true? 

• The horizontal acceleration is always zero. 

• Vertical acceleration of a projectile is constant. 

• Horizontal and vertical components of projectile are dependent on each other. 

• Horizontal and vertical components of projectile are independent on each other. 

What do you expect about the horizontal velocity of a projectile? (neglecting air resistance) 

• The horizontal velocity is zero. 

• The horizontal velocity is constant. 

• The horizontal velocity varies with time. 

• The horizontal velocity varies with mass. 

Which of the following is independent of the horizontal component of a projectile velocity? 

• its range

• the vertical component

• time

• none of these

What component is the velocity of a ball at the very peak of the ball’s path if it is thrown into the air at some angle? 

• entirely vertical 

• entirely horizontal 

• not enough information 

• both vertical and horizontal 

What is the vertical velocity of a projectile at the peak of travel? 

• 0 m/s² 

• 9.8 m/s² 

• -9.8 m/s² 

• 0 m/s 

How fast is a stone if fallen from a cliff at six seconds? 

• 9.8 m/s 

• 19.6 m/s 

• 58.8 m/s 

• 0 m/s 

Which of the following statements is true about the vertical motion of projectiles? 

• The vertical component of a projectile's velocity is constant. 

• The vertical component of a projectile's velocity is changing. 

• The vertical component of a projectile's velocity is a constant value of 9.8 m/s. 

• The vertical component of a projectile's velocity is changing at a changing rate. 

What is the horizontal acceleration of a projectile? 

• 0 m/s² 

• 9.8 m/s² 

• -9.8 m/s² 

• 0 m/s 

What do you call the path of a sepak takraw that is kicked from a height of two meters? 

• circular

• hyperbolic

• linear

• parabolic