Quiz: Acceleration

• What is the correct equation to calculate acceleration?

• a = (v_f * v_i) / t
• a = v_f + v_i
• a = v_i / t
• a = (v_f - v_i) / t

• What could it mean if acceleration is negative?

• Negative acceleration means the object is at rest.
• Negative acceleration indicates an object is gaining speed.
• Negative acceleration means the object is slowing down or moving in the opposite direction.
• Negative acceleration suggests the object is moving faster in the same direction.

• What could it mean if acceleration is positive?

• It suggests the object is moving in a circular path.
• It indicates the object is at rest.
• It means the object is slowing down.
• It means the object is speeding up.

• What happens to acceleration if the final velocity is equal to the initial velocity?

• Acceleration is constant.
• Acceleration is zero.
• Acceleration is negative.
• Acceleration increases linearly.

• Imagine it takes 2 seconds to reach 10 m/s. How many seconds would it take to reach the same 10 m/s with double the acceleration?

• 2 seconds
• 1 second
• 0.5 seconds
• 3 seconds

• On a distant planet, an object falls from rest and after 2 seconds reaches a velocity of 15 m/s. Calculate its acceleration.

• 10 m/s²
• 7.5 m/s²
• 5 m/s²
• 20 m/s²

• A car accelerates at such a rate that it takes 3 seconds to reach 100 m/s. What is its acceleration?

• 33.33 m/s²
• 10 m/s²
• 50 m/s²
• 20 m/s²

1. A 100-meter sprinter slows down from 15 m/s to 0 m/s in 5 seconds at the end of their race. Find the acceleration.

• -3 m/s²
• 0 m/s²
• -5 m/s²
• 2 m/s²