8 -physics

Which force is contact force?

• Magnetic force

• Gravitational force (weight force)

• Friction force

• Applied force

Which force is non-contact force

• Magnetic force

• Gravitational force( weight force)

• Friction force

• Applied force

What is contact force?

• Contact force is a force when two surface are in contact

• Contact force is a force when two surfaces are not in contact

What is non-contact force

• Non-contact force is a force when two surfaces are in contact

• Non-contact force is a force when two surfaces are not in contac

Unit for friction force?

• N

• Kg m/s2

• Kg

• m

• S

Unit for weight force?

• N

• Kg m/s

• Kg m/s2

• Kg

We can measure the size of force with device called...

• Forcemeter

• Spring balance

• Magnet

• Meter

If the resultant force is zero the forces are _____________

• Unbalanced

• Balanced

If the resultant force is not zero the forces are _________

• Unbalanced

• Balanced

If the forces on an object are note equal and opposite then they are unbalanced

• True

• False