Module 5 Displacement and Force in Two Dimensions

The resultant of a 20-N force acting on an object to the right and a 30-N force acting on the object to the left is ____ .

• 10 N to the left

• 30 N to the right

• 50 N

• 10 N

Tags

NGSS.MS-PS2-2

The resultant of a 40-N force acting on an object to the right and a 30-N force acting on the object to the left is ____ .

• 70 N

• 10 N to the right

• 10 N to the left

• 10 N

Tags

NGSS.MS-PS2-2

The force of kinetic friction between a box sliding on a surface depends on the ____ .

• force causing the motion

• normal force

• surface area of the box

• speed of the box

An object at rest on a horizontal surface has a weight of 200 N. A minimum force of 20 N is required to move the box. The coefficient of static friction is ____ .

• 
  0.10

• greater than 0.10

• 10

• greater than 10

Tags

NGSS.MS-PS2-2

For most surfaces, the coefficient of static friction is ____ the coefficient of kinetic friction.

• equal to

• unrelated to

• less than

• more than

A force of 500.0 N is represented graphically with its tail at the origin and the tip pointed in a direction 30.0° above the positive x-axis. The x-component of the vector is ____________N, and the y-component of the vector is ____________N. 

• x = 433 and y = 250

• x = 250 and y = 433

• x = 43 and y = 25

• x = 25 and y =43

Tags

NGSS.HS-PS2-1

What is the normal force of a 25.0 kg box sitting on a table?

• 250 N

• 245 N

• 0.392 N

• 25 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following is the correct definition of a vector?

• A quantity that has only magnitude

• A quantity that has only direction

• A quantity that has both magnitude and direction

• A quantity that has neither magnitude nor direction

 If two vectors are perpendicular, how can you find the magnitude of the resultant vector?

• By using the Pythagorean theorem

• By using the law of sines

• By using the law of cosines

• By using the law of tangents

What is the force that opposes the motion of two surfaces that are in contact with each other when there is no motion between the two surfaces?

• Tension force

• Friction force

• Gravity force

• Magnetic force