Force

Which one of the following is a force?

• energy

• mass

• weight

• speed

What is the mass of a man on the earth if his mass on the moon is 60 kg?

• 6 kg

• 10 kg

• 60 kg

• 360 kg

What is the force that slows down or stops sliding?

• weight

• gravity

• friction

• tension

Which one of the following is a force-measuring tool?

• equal-arm balance

• dynamometer

• lever

• ruler

Two forces F₁ = 2 N and F₂ = 8 N are acting on an object in opposite directions.

What will be the direction and the magnitude of the resultant force?

• directed in F₁ , R =10 N

• directed in F₁ , R = 6 N

• directed in F₂ , R = 10 N

• directed in F₂ , R = 6 N

Which statement about friction force is correct?

• it is in the opposite direction to motion

• it is in the same direction as motion

• it doesn’t depend on the surface

• the mass of the object doesn’t effect it

What is the mass of a boy weighing 450 N?

• 45 kg

• 50 kg

• 55 kg

• 60 kg

Which one of the following is a unit of force?

• N

• min

• kg

• D) km

What is the force that slows down or stops sliding?

• weight

• gravity

• friction

• tension

Three forces: 25 N, 30 N, 40 N act on object on the same line either in the same direction or in opposite directions. Which one of the following can not be the resultant of these forces?

• 5 N

• 15 N

• 35 N

• 95 N