IPC TEST CHAPTER 12

What is a force?

• a collision of two objects

• a push or a pull

• the motion of objects

• the resistance of two objects when they touch each other

What is the unit of force?

• Galileo

• newton

• kg(m)

• m/s^2

Which of the following is a contact force?

• electric force

• friction force

• gravitational force

• magnetic force

Which of the following is the result of a field force?

• A tossed ball to the ground

• An apple press squeezes out apple cider

• The eigth graders win against the ninth graders in tug of war

• An airplane is jostled because of wind shear

Multiple, simultaneous forces that cancel each other out are called ______ forces

• balanced

• accelerating

• unbalanced

• summative

Any change in motion must be initiated by a(n) _________ force

• balanced

• accelerating

• unbalanced

• summative

How is the magnitude of a force represented in a free-body diagram?

• by the length of the arrow

• by the location of the arrowhead

• by the number of arrows

• by the width of the arrow

Your dog pulls on his leash with a force of 95 N to the left. You pull in the opposite direction with a force of 55N. What is the net force acting on the leash

• 40 N to the left

• 40 N to the right

• 150 N to the left

• 150 N to the right

Alex pulls a rope with a force of 83 N to the right. Jared helps him pull in the same direction with a force of 136 N. What is the net force acting on the rope

• 53 N to the left

• 53 N to the right

• 136 N to the right

• 219 N to the right

True or False. Tripling the force on an object will triple its acceleration

• T

• F