Quiz on Forces and Torque

What are parallel forces acting in the same direction called?

• Unlike parallel forces

• Balanced forces

• Unbalanced forces

• Like parallel forces

What is the resultant force when a body is in equilibrium?

• Equal to zero

• Less than zero

• Undefined

• Greater than zero

What is the force called that brings a system to equilibrium?

• Couple

• Torque

• Equilibrant

• Resultant force

What is the turning effect of a force about a fixed point called?

• Momentum

• Equilibrium

• Torque

• Force

What is the SI unit of torque?

• Newton metre (Nm)

• Newton (N)

• Pascal (Pa)

• Joule (J)

What does a couple consist of?

• Two equal and like forces

• Two unequal and unlike forces

• Two equal and unlike forces

• Two unequal and like forces

What is the formula for the moment of a couple?

• M = F x d

• M = F - S

• M = F x S

• M = F + S

What happens when you apply force at a point far from the fixed edge of a door?

• It has no effect

• It makes it harder to open

• It increases the turning effect

• It decreases the turning effect

What is the principle of moments?

• Torque is always positive

• Forces must be equal

• Sum of forces equals zero

• Sum of clockwise moments equals sum of anticlockwise moments

What is the effect of a heavier person on a seesaw?

• It makes the seesaw unstable

• It has no effect

• It causes the lighter person to lift

• It causes both to balance