IGCSE Force

A car moves along a level road.

The diagram shows all of the horizontal forces acting on the car.

Which statement is correct?

• The car is slowing down.

• The car is speeding up.

• The car is moving at a constant speed.

• The car is moving backwards.

Which force and distance produce the smallest moment about a pivot?

• a 6.0 N force at a perpendicular distance of 4.0m from the pivot

• a 7.0 N force at a perpendicular distance of 6.0 m from the pivot.

• a 10 N force at a perpendicular distance of 4.0 m from the pivot

• a 12 N force at a perpendicular distance of 3.0 m from the pivot.

A resultant force of 4.0N acts on an object of mass 0.50 kg for 3.0 seconds.

What is the change in velocity caused by this force?

• 4.0 m / s

• 6.0 m / s

• 12 m / s

• 24 m / s

The diagram shows a tug-of-war between team X and team Y. The arrows show the forces exerted by the teams on the rope.

What is the size of the resultant force on the rope and in which direction does the resultant force act?

• size of resultant force = 75 N; direction of resultant force = to the left

• size of resultant force = 75 N; direction of resultant force = to the right.

• size of resultant force = 725 N; direction of resultant force = to the left

• size of resultant force = 725 N; direction of resultant force = to the right.

Which property of an object cannot be changed by a force?

• mass

• motion

• shape

• size

An unstretched spring obeys Hooke’s law and has a length of 10 cm. A load with a mass of 2.0 kg is hung from it, and its length becomes 14 cm.

The load is now increased to 6.0 kg, and the new length of the spring is Y. The limit of proportionality is not reached.

What is Y?

• 22 cm

• 26 cm

• 30 cm

• 42 cm

A spring is suspended from a stand. Loads are added and the extensions are measured.

Which graph shows the result of plotting extension against load?

• 
• 
• 
• 

A ball is dropped from a table-top. Air resistance may be ignored.

Which row describes the velocity and the acceleration of the ball at point X

• acceleration = constant; velocity = constant

• acceleration = constant; velocity = increasing

• acceleration = increasing; velocity = constant

• acceleration = increasing; velocity = increasing

The diagram shows the speed-time graph for a car.

Which area represents the distance travelled while the car is accelerating?

• X

• X + Y

• Y

• Y - X

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

Tags

NGSS.HS-PS2-1