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Worksheets1.5.4 Centre of mass & 1.5.3 Turning effect
Total questions: 15
Worksheet time: 30mins
Diagram shows 4 objects on a flat surface.
M is the centre of mass of the objects.
Which object is about to fall over?
A
B
C
D
Passengers are not allowed to stand on the upper deck of double-decker buses.
Why is this?
They would cause the bus to slow down.
They would increase the kinetic energy of the bus.
They would cause the bus to become unstable.
They would lower the centre of mass of the bus.
Diagram shows a uniform , flat-metal sheet hanging freely from a nail at point A.
A weight also hanging freely on a string tied to A.
Which point is the centre of mass?
A
B
C
D
The diagram shows a balance being used to find the weight of a baby. The weight of the basket can be ignored.
At equilibrium, the pivot is nearer to the weight W than to the baby.
What is the weight of the baby?
less than W
more than W
W
A beam pivoted at one end has a force of 5.0N acting vertically upwards as shown.
The beam is in equilibrium.
What is the weight of the beam?
2.0N
3.0 N
3.3 N
5.0 N
Diagram shows a force being applied to a lever to lift a heavy weight.
Which change would enable the heavy weight to be lifted with smaller force?
Move the force to the right
Move the heavy weight to the right
Move the force to the left
Move the pivot to the left
Diagram shows a wooden beam with two forces acting on it.
Which way will the beam move?
accelerate up the page
accelerate down the page
turn anticlockwise
turn clockwise
Diagram shows an object of weight W and an object of weight Z balanced on a uniform metre rule.
Which equation relating to W, Z, a and b is correct?
W/a = Z/b
W × Z = a × b
W × a = Z × b
W × (a + b) = Z
Diagram shows a plank balanced on a pivot.
Three forces F, P and Q act on the plank, as shown.
The force F is increased, but continues to act at the same distance from the pivot.
The plank is no longer balanced.
Which change could make the plank balance again?
decrease Q
increase P
move P further from the pivot
move Q further from the pivot
The diagram shows an unbalanced rod.
Two loads X and Y can be moved along the rod.
The rod turns in a clockwise direction as shown.
Which action could make the rod balance?
moving X to the left
moving X to the right
moving Y to the right
moving the pivot to the left
Diagrams show three uniform beams P, Q and R, each pivoted at its centre.
Two forces acting on each beam are also shown.
Which beams rotate anti-clockwise?
A simple balance has two pans suspended from the ends of arms of equal length.
When it is balanced, the pointer is at 0.
Four masses (in total) are placed on the pans, with one or more on pan X and the rest on pan Y.
Which combination of masses can be used to balance the pans?
1 g, 1 g, 5 g, 10 g
1 g, 2 g, 2 g, 5 g
2 g, 5 g, 5 g, 10 g
2 g, 5 g, 10 g, 10 g
When two blocks X and Y are placed on a uniform beam, the beam balances on a pivot at its centre as shown.
What does this show about X and Y?
They have the same mass and the same density
They have the same mass and the same weight.
They have the same volume and the same density.
They have the same volume and the same weight.
