Practice Quiz - 40% Unit 2

Which of the following best describes the force friction?

• A force that goes in the same direction of the movement of an object

• A force that opposes (goes against) the movement of an object

• It speeds up the object that is moving

• A force which is a non-contact force

• The direction of the force always faces upwards

The following statement best describes which force?

"This force is exerted by surfaces that have objects on top. It prevents solid objects to pass through other objects. In other words, this force allows surfaces to hold objects on top of them"

• No force

• Friction Force

• Gravity Force

• Elastic Force

• Normal Force

Gravity works in a _____________?

• Downwards direction because the earth is bigger in size

• Downwards direction because another force is pulling us down.

• Downwards direction because the direction is towards the center of the Earth

• Downwards direction there is no reason why. Just because.

• Downwards direction because mass makes us heavy and helps us stay on the ground

Which of the following is correct?

• Gravity is a pull force

• Gravity is a push force

• Normal force always works upwards

• Normal force always works downwards

• Friction is neither pull or pull

A force is a ____________ or a pull that results from the _____________ between two objects. They are represented by _______________. The length represents a force’s ____________ and the point represents a force's _______________.

• Pull – Interaction – Vectors – Magnitude – Direction.

• Push – Attraction – Vectors – Magnitude – Direction.

• Push – Attraction – Vectors – Direction – Magnitude.

• Push – Interaction – Vectors – Direction – Magnitude.

• Push – Interaction – Vectors – Magnitude - Direction.

Which of the following actions require a push?

• 
• 
• 
• 
• 

Five children push 5 cars that are exactly the same, with different forces in different surfaces. Which of the toy cars will move more?

• Car A

• Car B

• Car C

• Car D

• Car E

What affect will the forces have on the box shown in the image?

• Stop the box from moving

• Move the box upwards

• Move the box to the right

• Move the box to the left

• Move the box downwards

The image shows two vectors representing the forces required to push an object. Which statement is true?

• The force to the left is larger, because the vector is shorter.

• The force to the right is larger because the vector is longer.

• Both forces are the same because both vectors have the same direction.

• Both forces are the same because both vectors have the same magnitude

• The force to the left will cause the object to move to the right.

Students are playing tug-of-war. If group B pulls the rope to the right with a force of 400 N and group A pulls the rope to the left with a force of 250 N, what will happen to the ribbon in the middle of the rope? and why?

• The ribbon will move to the left because the net force is 150N to the left

• The ribbon will move to the left because the net force is 650N to the left

• The ribbon will move to the right because the net force is 650N to the right

• The ribbon will move to the right because the net force is 150N to the right

• The ribbon will stay in the same place and not move.