Section 7 Practice Quiz

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

What is a force that works AGAINST MOTION?

• Force
• Motion
• Gravity
• Friction

Tags

NGSS.MS-PS2-2

A 95kg clock initially at rest on a horizontal floor requires a 650N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 560N keeps it moving with a constant velocity. What is the coefficient of static friction?

• .7
• .6
• .5
• .4

A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30.0° above the horizontal. If the horizontal component of the force on the suitcase is 60.6 N, what is the force exerted on the handle? 

• 53.0 N 
• 70.0 N 
• 65.2 N 
• 95.6 N 

What is the net force needed to make a 1,300 kg car accelerate at .05 m/s^2?

• 25 N

• 50 N

• 75 N

• 65 N

Tags

NGSS.MS-PS2-2

Dallin is hover boarding down they hall at a constant velocity. Assuming there is friction, which of the following must be true?

• The force applied by the board must be greater than the frictional force
• The frictional force must equal the force applied by the board
• The force applied must equal zero
• There is not enough information

Tags

NGSS.HS-PS2-1

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Tags

NGSS.MS-PS2-1

What is the standard unit force is measured in?

• Newtons
• pounds
• grams
• meters

Scott dropped a sheet of paper from a second floor balcony. The wind was blowing in the direction shown in the diagram.

In which direction did the sheet of paper most likely travel?

• 
• 
• 
• 

In the free-body diagram shown above, which of the following is the gravitational force acting on the balloon?

• 5120 N
• 950 N
• 1520 N
• 4050  N