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