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True or False?
20 questions
Question 1
The moment of a force F about a
pivot is F/d
False - Fxd
Question 2
The centre of mass of an object is
the point where its mass is spread
out.
False - concentrated
Question 3
A suspended object is in equilibrium
when its centre of mass is directly
beneath the point of suspension.
True
Question 4
The centre of mass of a
symmetrical
object is off the axis of
symmetry.
False - on
Question 5
True - W1d1=W2d2
Question 6
The stability of an object is
decreased by making its base as
wide as possible
False - increased
Question 7
The stability of an object is
increased by making its centre
of mass as high as possible.
True
Question 8
An object will topple over if the
line of action of its weight is outside its base.
True
Question 9
The greater the mass of an object
the lower the centripetal force.
False - greater
Question 10
The Centripetal force increases
as the radius of the circle decreases.
True
Question 11
Gravity is measured in
Newtons.
False – N/kg
Question 12
The force of gravity between two
objects is an attractive force.
True
Question 13
The greater the distance between two objects the greater the force of gravity.
False - smaller
Question 14
The smaller two objects are the
greater the force of gravity.
False - smaller
Question 15
The larger an orbit is the
longer
the orbiting body takes to go
round.
True
Question 16
If the speed of a planet in orbit is
too high it will spiral into the Sun.
False – fly off into space
Question 17
If the speed of a planet in orbit is
too low it will spiral into the Sun.
True
Question 18
A Geostationary satellite orbits
the
earth in 20 hours.
False – 24 hours
Question 19
Geostationary satellites are used for many purposes Including weather forecasting and police surveillance.
False - communications
Question 20
Monitoring satellites are in much
lower orbits than geostationary.
True