Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. IGCSE
  3. Physics Edexcel
  5. Question bank

Forces, movement, shape and momentum

EasyMedium
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283
Question 34

A security guard manually operates a heavy hinged boom barrier at a parking lot entrance.

a.

State the equation linking work done, force, and distance moved.

[1]
b.

The guard pushes the barrier arm with a horizontal force of 15 N15\text{ N}15 N through a distance of 14 m14\text{ m}14 m to close it. Calculate the work done on the barrier by the guard.

[1]
c.

How much energy is transferred to the barrier?

[1]
d.

When released, the heavy boom barrier arm falls from its vertical open position to a horizontal closed position. Explain why the arm loses gravitational potential energy when it falls.

[1]
e.

The guard starts to lift the barrier arm again by pulling vertically upwards on the far end with a force FFF. The total weight of the barrier arm is 400 N400\text{ N}400 N.

A diagram of a horizontal boom barrier arm with a hinge labelled as a pivot on the far left. A downward arrow of 400 N acts at a distance of 1.2 m to the right of the pivot. At the far right, an upward arrow representing the lifting force F acts at a distance of 1.8 m further to the right.

State the equation linking moment, force, and perpendicular distance from the pivot.

[1]
f.

Calculate the force FFF that the guard must apply to the end of the barrier arm to start raising it.

[3]

Forces, movement, shape and momentum Questions

  1. IGCSE
  2. /Physics
  3. /Forces, movement, shape and momentum