9.Force Mass and Momentum Quiz

What is the SI Unit of Force?

• Second

• Meter

• Newton

• Kilogram

What is the relationship between Force and Acceleration?

• Exponential

• No Relationship

• Inversely Proportional

• Directly Proportional

What is the SI Unit of Mass?

• Kilogram

• Second

• Newton

• Meter

What is the relationship between Mass and Weight?

• Exponential

• No Relationship

• Inversely Proportional

• Directly Proportional

What is the SI Unit of Momentum?

• Second

• Kilogram Meter per second

• Newton

• Kilogram

State Newton’s First Law of Motion

• The forces on the skydiver as he falls are his weight W that acts downwards and air resistance R that acts upwards.

• If a body A exerts a force on a body B then body B exerts a force equal in magnitude but opposite in direction on A.

• The rate of change of the body’s momentum is directly proportional to the force and takes place in the direction of the force.

• Every body will remain in a state of rest or travelling with a constant velocity unless an unbalanced external force acts on it.

State Newton’s Second Law of Motion

• When an unbalanced force acts on a body, the rate of change of the body’s momentum is directly proportional to the force and takes place in the direction of the force.

• The rate of change of the body’s momentum is directly proportional to the force and takes place in the direction of the force.

• If a body A exerts a force on a body B then body B exerts a force equal in magnitude but opposite in direction on A.

• Every body will remain in a state of rest or travelling with a constant velocity unless an unbalanced external force acts on it.

State Newton’s Third Law of Motion

• If a body A exerts a force on a body B then body B exerts a force equal in magnitude but opposite in direction on A.

• Every body will remain in a state of rest or travelling with a constant velocity unless an unbalanced external force acts on it.

• The rocket exerts a force on the gas pushing the gas backwards.

• The rate of change of the body’s momentum is directly proportional to the force and takes place in the direction of the force.

What is Friction?

• A force that opposes one surface sliding along another.

• The relationship between force, mass, and acceleration.

• The weight of an object.

• The SI unit of weight.

Explain why the man appears weightless in a freely falling lift.

• The lift accelerates downward at 9.8 m/s².

• The man has no acceleration relative to the lift.

• There are no forces acting on the man relative to the lift.

• The forces acting on the man are balanced