Projectile Motion, Rotary and Centripetal Motion

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

Tags

NGSS.HS-PS2-1

What is the horizontal acceleration of a projectile?

• 0 m/s²
• 9.8 m/s²

Tags

NGSS.HS-PS2-1

The shape of the path a projectile follows...

• circular
• linear
• wavy
• parabolic

Two objects of the same mass are launched from the ground. Object A has a launch angle of 45, while Object B has a launch angle of 65. Which object will hit the ground first?

• A
• B
• Both objects hit the ground at the same time
• unable to determine with the given information

A projectile is fired with initial velocity v_o at an angle θ₀ with the horizontal and follows the trajectory shown above. Which of the following pairs of graphs best represents the vertical components of the velocity and acceleration, v and a, respectively, of the projectile as functions of time t?

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. How do the speeds of the ball at the three points compare?

• v_P < v_Q < v_R

• v_R < v_Q < v_P

• v_Q < v_R < v_P

• v_Q < v_R = v_P

• v_P = v_Q < v_R

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

NGSS.HS-PS2-4

Two balls of the same mass begin at a height of 2m. One is released from rest while the other begins with a horizontal velocity of 5m/s. Which object its the ground first?

• Ball A
• Ball B
• Both balls his the ground at the same time
• unable to determine with information given

Tags

NGSS.HS-PS2-1

A boy throws a ball at an angle of 30º at a speed of 20 m/s. What is vertical component of velocity and what is the horizontal component of velocity?

• 15 m/s , 12.5 m/s

• 20 m/s, 15 m/s

• 10 m/s , 17.32 m/s

• 12.5 m/s, 12.5 m/s

A boy throws a ball at an angle of 30º at a speed of 20 m/s. After how much time the vertical velocity will be zero and what is the total time of flight?

• 2.04, 1.02

• 1.02, 2.04

• 1.02, 1.02

• 2.04, 2.04

Tags

NGSS.HS-PS2-1

A boy throws a ball at an angle of 30º at a speed of 20 m/s. What is the range?

Hint: T_f×V_x

• 23.33 m

• 30 m

• 35.33 m

• 44.44 m