Moments practice exam questions
Name _____________________________-
50 minutes
48 marks
Page 1 of 13
, Q1. A waiter holds a tray horizontally in one hand between fingers and thumb as shown in the
diagram.
P, Q and W are the three forces acting on the tray.
(a) (i) State two relationships between the forces that must be satisfied if the tray is to
remain horizontal and in equilibrium.
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.............................................................................................................
.............................................................................................................
(ii) If the mass of the tray is 0.12 kg, calculate the magnitude of the force W.
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(iii) Calculate the magnitudes of forces P and Q.
.............................................................................................................
.............................................................................................................
.............................................................................................................
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(6)
(b) The waiter places a glass on the tray. State and explain where the glass should be
positioned on the tray if the force, P, is to have the same value as in part (a).
......................................................................................................................
......................................................................................................................
......................................................................................................................
(2)
(Total 8 marks)
Page 2 of 13
Name _____________________________-
50 minutes
48 marks
Page 1 of 13
, Q1. A waiter holds a tray horizontally in one hand between fingers and thumb as shown in the
diagram.
P, Q and W are the three forces acting on the tray.
(a) (i) State two relationships between the forces that must be satisfied if the tray is to
remain horizontal and in equilibrium.
.............................................................................................................
.............................................................................................................
.............................................................................................................
(ii) If the mass of the tray is 0.12 kg, calculate the magnitude of the force W.
.............................................................................................................
.............................................................................................................
.............................................................................................................
(iii) Calculate the magnitudes of forces P and Q.
.............................................................................................................
.............................................................................................................
.............................................................................................................
.............................................................................................................
(6)
(b) The waiter places a glass on the tray. State and explain where the glass should be
positioned on the tray if the force, P, is to have the same value as in part (a).
......................................................................................................................
......................................................................................................................
......................................................................................................................
(2)
(Total 8 marks)
Page 2 of 13
