P5.5 Resolution of forces

What is the primary purpose of resolving a single force into two components?

• To determine its overall magnitude.

• To find its effect in two perpendicular directions.

• To change its direction of action.

When can two components have the same effect as the original single force?

• Only if they are parallel to the original force.

• If they are perpendicular to each other and drawn from the same point.

• If they are equal in magnitude.

What is meant by the "resultant of a force"?

• The single force that can replace two or more forces and have the same effect.

• The sum of all forces acting on an object.

• The force that opposes motion.

How are the direction and magnitude of the components represented in a scale vector diagram?

• By the angle and length of the arrow.

• By the arrowhead and the thickness of the line.

• By the length of the arrow and the arrowhead.

Why is it often difficult to travel uphill than it is to travel on a flat road?

• Because the engine has to work harder.

• Because of the horizontal component of the car's weight acting down the slope.

• Because friction is always greater uphill.

In the context of equilibrium, what is true about the resultant force on an object?

• It is always positive.

• It is equal to zero.

• It is equal to the applied force.

When forces on an object have no overall turning effect, what does this indicate?

• The object is accelerating.

• The object is in rotational equilibrium.

• The object is moving at a constant velocity.

What is a useful step in resolving a force into horizontal and vertical components?

• Draw a parallelogram of forces.

• Draw a scale vector diagram of the force.

• Measure the angle of the slope directly.

If an aircraft is flying at a constant horizontal velocity, and a horizontal wind force is acting on it, what can be said about the forces?

• The forces are unbalanced.

• The aircraft is accelerating horizontally.

• The horizontal components of the wind force and the aircraft's thrust are in equilibrium.

When resolving the weight of an object on a slope, what are the two perpendicular components usually considered?

• Parallel and perpendicular to the slope.

• Horizontal and vertical.

• Gravitational and frictional.