Front

Lực ma sát là gì?

Back

It is the force that opposes the motion of an object when it contacts another surface.

Front

Name three types of friction.

Back

Static friction, sliding friction, and rolling friction.

Front

What is the formula for friction force?

Back

F = μ ⋅ N

Front

A box of mass 10 kg rests on a floor. The coefficient of static friction is 0.4. Find the maximum static friction.

Back

Fmax​ = 0.4 × 10 × 9.8 = 39.2N

Front

What happens if the applied force is less than static friction?

Back

Vật không chuyển động.

Front

Give an example of rolling friction.

Back

A ball rolling on the floor.

Front

Cho ví dụ về ma sát nghỉ trong đời sống.

Back

A book resting on a tilted desk without sliding.

Front

Which is usually stronger: static friction or sliding friction?

(Ma sát nghỉ hay ma sát trượt thường lớn hơn?)

Back

Static friction is usually stronger.

(Ma sát nghỉ thường lớn hơn.)

Front

Ma sát lăn có nhỏ hơn ma sát trượt không?

Back

Yes, rolling friction is usually smaller.

Front

When does sliding friction occur?

Back

It occurs when one object slides over another

(Khi một vật trượt trên bề mặt của vật khác.)