Kinematics Equation Review

An object is moving with a velocity of 4.0 m/s when it begins to accelerate. It accelerates at 3.0 m/s² for a time period of 5.0 s. What equation do you use to find the object's final velocity?

• v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• v_f ² = v_i² + 2ax

Tags

NGSS.HS-PS2-1

An object is moving with a starting velocity of 5.0 m/s. It accelerates constantly at 2 m/s² for a time period of 3.0 s. What equation do you use to find displacement?

• v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• 
  v_f ² = v_i² + 2ax

An object suddenly speeds up from 4 m/s and accelerates at a rate of 2.0 m/s²  for 5 meters. What equation do you use to find final velocity?

• v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• v_f ² = v_i² + 2ax

An object changes its velocity from 4.0 m/s to 6.0 m/s. Over 2 seconds, what equation do you use to find the displacement of the object?

• v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• v_f ² = v_i² + 2ax

What is this kinematics equation not have? v_f ² = v_i² + 2ax

• Final velocity

• Initial velocity

• time

• acceleration

• Displacement

What is this kinematics equation not have? x = v_it + (1/2)at²

• Final velocity

• Initial velocity

• time

• displacement

• Time

What is this kinematics equation not have? v_f = v_i + at

• Final Velocity

• Initial Velocity

• Acceleration

• Displacement

• Time

What is this kinematics equation not have? x = (1/2) (v_f + v_i) t

• Final Velocity

• Initial Velocity

• Displacement

• Acceleration

• Time

If I don't have any information about displacement, but I know final velocity, initial velocity, acceleration, and time...which equation should I use?

• v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• v_f ² = v_i² + 2ax

If I don't have any information about time, but I know final velocity, initial velocity, acceleration, and displacement...which equation should I use?

• 
  v_f = v_i + at

• x = v_it + (1/2)at²

• x = (1/2) (v_f + v_i) t

• v_f ² = v_i² + 2ax