Physics unit 3

Pregunta	Respuesta
An object in equilibrium has: a) no resultant force or resultant turning effect. b) has no resultant force but has turning force. c) has no turning force but has resultant force.	a) no resultant force or resultant turning effect.
The point of the anticlockwise moments about any point= a) the sum of anticlockwise moment about that point b) the sum of the moments c) the sum of the clockwise moments about that point	c) The sum of the clockwise moments about that point
Every object behaves as if its mass were concentrated this point is called...?	Centre of mass
When a suspended object is in equilibrium its centre of mass is- a) directly beneath the point of suspension b) directly beneath the middle of the object c) directly beneath the the axes of symmetry	a) directly beneath the point of suspension
Where is the centre of mass of a symmetrical object?	Along the axis of symmetry.
How do you increase the stability of an object?	By making its base as wide as possible and its centre of mass as low as possible.
What is a vector?	A physical quantity that has direction.
What is a scalar?	A scalar is a physical quantity that does not have direction.
The parallelogram of forces is used to find the resultant of- a) two forces that do not act along the same vector. b) one force that does no act along the same magnetism. c) two forces that do not act along the same line	c) two forces that do not act along the same line

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	Creado por Alex Nolan hace alrededor de 9 años