Halloween Friction Practice

A ghost exerts a 30 N horizontal force as it pulls a 40 N haunted sled across a spooky sidewalk at a constant speed. What is the coefficient of friction between the spooky sidewalk and the haunted sled?

• 0.5

• 0.75

• 0.25

• 0.1

What spooky force is needed to pull the haunted sled and ghostly friend at a constant speed if the combined weight of the ghostly friend and the haunted sled is 700 N and the coefficient of eerie friction is 0.11?

• 77 N

• 70 N

• 77.7 N

• 70.7 N

Tags

NGSS.HS-PS2-1

A witch uses a magical force of 25 N to slide a 15 kg enchanted crate across a haunted floor at a constant velocity. What is the coefficient of kinetic friction between the crate and the floor?

• 0.10

• 0.15

• 0.17

• 0.25

Tags

NGSS.HS-PS2-1

What is the weight of a pumpkin crate with a mass of 30 kg on a haunted hill?

• 300 N

• 294 N

• 294 kg

• 315 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A haunted crate of mass 30 kg is pulled along a spooky kitchen floor. The static friction coefficient is 0.25 and the kinetic friction coefficient is 0.15. What force will be needed to start the crate moving?

• A. 73.5 N

• B. 75 N

• C. 80 N

• D. 85 N

Tags

NGSS.HS-PS2-1

What force is needed to keep a 30 kg pumpkin moving at a constant velocity if the coefficient of kinetic friction is .15?

• 44.1 N

• 12.6 N

• 73.5 N

• 30 N

Tags

NGSS.HS-PS2-1

Once moving, what total force must be applied to keep a 30 kg pumpkin accelerating at 5 m/s² on a haunted hill? The kinetic coefficient of friction is .15.

• 44.1 N

• 194.1 N

• 105.9 N

• 294 N

Tags

NGSS.HS-PS2-1

A ghostly force of 21 N accelerates a 9.0 kg haunted wagon at 2.0 m/s² along the eerie sidewalk. How large is the spooky frictional force?

• 15 N

• 3 N

• 21 N

• 18 N

Tags

NGSS.HS-PS2-1

The coefficient of friction is like:

• How quickly a witch can accelerate her broomstick.

• A measure of how easy or difficult it is for two spooky objects to move when they are in contact with each other.

• A constant value for all haunted materials.

• The force required to move a ghostly object.

Tags

NGSS.HS-PS2-1

On which spooky surface would friction be the greatest?

• haunted carpet

• icy graveyard

• snowy cemetery

• silky cobwebs