Physics Quiz 9

Vectors are equivalent if they have the same magnitude and direction. Which are equivalent vectors?

• u and -u

• u and a

• u and v

• u and b

Three vectors are added following the rules of vector addition. A fourth vector is drawn from the tail of the first vector to the head of the last vector. This fourth vector is referred to as ____.

• the equilibrant

• the hypotenuse

• the resultant

• the mistake

What is force in physics?

• A power in star wars

• A push or pull on an object

• A stop on an object

• The start of an object

What can force do to an object?

• Accelerate an object

• Slow down an object

• Have the object remain in place

• Have the object change shape

• All of the above

What is the unit for FORCE?

• N (Newtons)

• lbs (pounds)

• g (grams)

• m/s (meters per second)

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

What is the resultant of these two vectors?

• +17 m

• +3 m

• -17 m

• -3 m

If two vectors to be added are at right angles, you will need to....

• Multiply

• Divide

• Pythagorean Theorem

• Use trigonometry

Bob walks 2 miles north and turns west and walks 2 miles. What is Bob's general displacement?

• 4 miles northeast

• 4 miles northeast

• 3 miles northwest

• 3 miles southeast

What is the magnitude of the resultant vector, r?

• 3

• 4

• 5

• 7