Uniformly Accelertated Linear Motion Model: Force 1

Physics 1: Section 3.3

What is force?

An influence from a systems surroundings that changes its velocity

What is the symbol and SI unit for force?

F subscript and newton

What is the right question to ask and how is it answered?

What changes motion? It is because of Newtons second law of motion

What is Newtons second law of motion?

Acceleration is directly proportional to the magnitude of the net force

What is the equation for Newtons second law of motion?`

a_x ∝ F_{net, x}

What does net force cause?

Acceleration

Acceleration is inversely proportional to what?

The mass

What is the equation that shows acceleration is inversely proportional to the mass?

a_x ∝ 1/m

What equation do you get when you combine the magnitude of the net force and proportional to the mass?

a_x = F_net,x / m

What is Newtons second law generally expressed as?

F_net,x = ma_x

How can acceleration be found?

From either kinematics or dynamics, depending on which unknows

If the net force on an object is decreased by a factor of ten, what happens to the acceleration of the object?

Decreases by a factor of ten

If the mass of an object is increased by a factor of three, what happens to the acceleration of the object? Assume that the net force remains constant.

Decreases by a factor of three

What can be said about the net force on an object that is undergoing constant acceleration?

The net force is also constant

Which terms represent a vector quantity and its respective unit?

Force - newton

For a certain interval of time, an object is acted on by a constant non-zero force. Which of the following statements is true for this interval of time? (Select all that apply.)

The object’s velocity changes

The object is accelerating