Phy Sci 6ed Chap 12 Review

The best definition of a force is

• A push or pull on an object

• the motion of an object

• a collision of 2 objects

• a resistance to motion

What kind of a force would be demonstrated by an apple falling to the ground?

• mechanical force

• field force

• nonconservative force

• centripetal force

If all forces acting on an object are canceled out by opposing force, the forces are said to be

• balanced forces

• equal forces

• additive forces

• kinetic forces

based on the force diagram shown here, will the box accelerate? if so in which direction

• it will not accelerate, forces are balanced

• it will accelerate right

• it will accelerate left

• it will accelerate down

You are playing with a cat using a toy mouse on a string. If the cat pulls on the string with a force of 20 N and you pull back with a net force of 15 N, what is the net force acting on the string?

• the forces are in balance

• 5 N toward the cat

• 5 N toward you

• 35 N

When a net force acts opposite the direction of motion

• the object will immediately begin to slow down

• the object will immediately stop motion

• the object will immediately change direction

• the object will continue in its previous state of motion

What is the acceleration of a 1200 kg motorcycle that experiences a net force of 5000 N pointing west

• 5000 m/s² west

• 6,000,000 m/s² west

• 4.17 m/s² west

• 0.24 m/s² west

Which scenario demonstrates Newton's third law?

• you kick a ball with a force of 50 N

• you kick a ball with a force of 30 N and it exerts a force of 30 N on you

• you kick a ball with a force of 30 N and it exerts a force on you of 15 N

• you kick a ball with a force of 30 N and it exerts a force on you of 3 N

Draw the vector representing the normal force acting on the box M

Answer explanation

The normal force is always perpendicular to the surface, it is the 3rd law reaction force to the object in contact with a surface.

Which of the following forces is a field force

• contact between two objects

• friction

• gravity

• a normal force