Import

• The study of how objects move is called kinematics
• The study of why objects move is called dynamics
• What is force defined as?

  A push or pull
• Force is a vector quantity.
• Force is a scalar quantity.

  False
• What is the unit of force?

  Newton
• Newton’s Second Law of Motion is F = m * a
• State Newton’s First Law of Motion.

  Inertia
• Arrange the relationships between force, mass, and acceleration according to Newton’s Second Law.

  1️⃣ Force is directly proportional to acceleration

  2️⃣ Mass is inversely proportional to acceleration
• Newton’s Third Law states that for every action, there is an equal and opposite reaction.
• What is the formula for weight?

  W = m * g
• What is the unit of mass?

  Kilogram
• Inertia is an object’s resistance to change in motion
• What is friction?

  A force that resists motion
• Kinetic friction acts between moving surfaces.
• Static friction is usually greater than kinetic friction.
• The formula for centripetal force is F_c = m * v^2 / r
• What is the formula for centripetal acceleration?

  a_c = v^2 / r
• Centripetal force is directly proportional to velocity.

  False
• Increasing the radius decreases centripetal force if mass and velocity are constant.
• What is the weight of a 70 kg person on Earth?

  686 N