Physics for Engineers - Long Exam 3

It is a type of force that acts at a distance without direct touch.

• friction force

• normal force

• non-contact force

• contact force

Which of the following is not a correct definition of force?

• It is a push and pull.

• It is the ability of an object to resist motion.

• It is a vector quantity, with magnitude and direction.

• It is an interaction between two objects or between an object and its environment.

Which of the following is an example of a non-contact force?

• force of gravity

• normal force

• tension force

• friction force

A normal force exists when an object rests or pushes onto the surface. The surface exerts a push on the object that is directed __________ to the surface.

• perpendicular

• parallel

• above

• below

A surface may exert a frictional force on an object, directed parallel to the surface and _________ to the object's motion.

• along

• perpendicular

• parallel

• opposite

A tension force is a pulling force exerted on an object by a rope, cord, etc. It acts in the direction of the string and _______ from the body.

• parallel

• towards

• perpendicular

• away

Which of the following is not a definition of weight?

• the mass of an object

• the force exerted by gravity on an object

• a vector quantity directed toward the center of the Earth

• the product of an object's mass and the acceleration due to gravity

What is the equivalent metric unit of Newton N?

• kg∙m/s

• kg∙m²/s

• kg∙m/s²

• kg∙m²/s²

Which of the following scenarios show the correct Free Body Diagrams?

• 
• 
• 
• 

A 10 kg girl pushes a box with a force of 50 N. What is the weight of the girl?

• 98 kg

• 98 N

• 10 kg

• 10 N