Outcome 9 Revision

Which of the following is a scalar quantity?

• Speed

• Velocity

• Acceleration

• Force

Which of the following is a vector quantity?

• Distance

• Time

• Speed

• Displacement

A car travels a distance of 300 meters in 20 seconds. What is its average velocity?

• 6 m/s

• 15 m/s

• 20 m/s

• 30 m's

An object accelerates from rest at a rate of 5 m/s² for 10 seconds. What is its final velocity?

• 5 m/s

• 10 m/s

• 25 m/s

• 30 m/s

A train decelerates uniformly from a velocity of 20 m/s to rest in 10 seconds. What is its acceleration?

• -2 m/s²

• -1 m/s²

• -1 m/s²2 m/s²

• 1 m/s²

The acceleration due to gravity on Earth is approximately:

• 5 m/s²

• 9.8 m/s²

• 12 m/s²

• 15 m/s²

Which of the following represents Newton's second law of motion?

• F = ma

• F = mv

• F = m/t

• F = md

According to Newton's third law of motion, for every action, there is an equal and opposite __________.

• Velocity

• Acceleration

• Reaction

• Momentum

According to Newton's second law of motion, the acceleration of an object is directly proportional to the:

• Mass of the object

• Force acting on the object

• Distance traveled by the object

• Velocity of the object

An object at rest will remain at rest and an object in uniform motion will remain in motion, unless acted upon by an external force, according to Newton's First Law.

• True

• False