Forces exit ticket - Sandra Kuhn | Biblioteka

1

The amount of matter the object contains

gravitational force

weight

density

mass

1

An object with a mass of 5 kg rests on a plane inclined 30º from horizontal. What is the component of the weight force that is parallel to the incline?

1

Given static and kinetic friction between two surfaces, which has a greater value? Why?

The static friction has a greater value because the friction between the two surfaces is more when the two surfaces are in relative motion.

The kinetic friction has a greater value because the friction between the two surfaces is more when the two surfaces are in relative motion.

The static friction has a greater value because the friction between the two surfaces is less when the two surfaces are in relative motion.

The kinetic friction has a greater value because the friction between the two surfaces is less when the two surfaces are in relative motion.

1

A 40 kg crate is being pushed horizontally across a floor. Its coefficient of kinetic friction is 0,4. What is the kinetic frictional force acting on the crate?

1

When the mass of an object increases then gravity (g) ....

increases

decreases

remains the same

1

Drugi mogući odgovor:

F⊥

F//

Fg (force of gravity)

Fnet

1

Friction acts:

only when an object is in motion

regardless of whether an object is moving or not

on stationary objects only

1

How would the absence of friction affect a marble traveling on a long, straight path?

The marble’s speed would increase

The marble’s speed would decrease

The marble would remain at a constant speed

The marble would stop immediately

1

How do you lower the friction force on a crate which is moving?

Use a smooth surface

By pushing down

By not pushing hard

Use a rough surface

1

How do you lower the friction force on a crate which is NOT moving?

By pushing down

By not pushing hard

1

Name the missing force...

tension force

normal force

frictional force

1

Name the missing force...

tension force

applied force

frictional force

1

Which diagram best shows person pushing a couch (accelerating) across the floor?

null

1

Which diagram best shows person pushing a couch (at constant velocity) across the floor?

null

1

Which has the highest coefficient of friction?

ice

carpet

waxed floor

tile