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1Relating to or arising from inertia.‘high-speed centrifuges generate large inertial forces’‘the inertial load on the motor’
- ‘The interesting thing is that, physically, no difference has been found between gravitational and inertial mass.’
- ‘Another way of understanding the situation is to remember the equivalence Einstein explained between gravitational and inertial forces.’
- ‘Einstein warmed to the idea that the gravitational field of the rest of the Universe might explain centrifugal and other inertial forces resulting from acceleration.’
- ‘In Newton's theory, all three of these masses - the inertial mass, the active and passive gravitational masses - are equivalent.’
- ‘If its axis were to be suddenly shifted from its normal inclination, inertial forces produced in such a change would literally tear the earth apart.’
- 1.1 (of navigation or guidance) depending on internal instruments which measure a craft's acceleration and compare the calculated position with stored data.
- ‘A rocket's inertial guidance system measures acceleration along three principal directions.’
- ‘The aircraft's navigation system includes an integrated inertial navigation and global positioning INS / GPS system.’
- ‘Inside is a guidance control unit with inertial navigation and global positioning systems.’
- ‘The missile has new GPS / INS (global positioning / inertial navigation) guidance and kinetic warhead.’
- ‘The aircraft uses a Honeywell inertial navigation system.’
- 1.2 (of a frame of reference) in which bodies continue at rest or in uniform straight motion unless acted on by a force.‘the laws of physics take the same form in all inertial frames’
- ‘Simple laws apply to constant motion in a straight line (an inertial frame of reference).’
- ‘Photons, according to the special theory of relativity, move in vacuum with the same speed in all inertial frames of reference.’
- ‘A reference frame in which star motion is ignored and the stars are assumed to be at rest is approximately an inertial reference frame and is often adequate for many purposes.’
- ‘The rest-mass of a body is the inertial mass of that body when it is at rest relative to an inertial frame.’
- ‘Mach had stated a principle that local inertial frames of reference were determined by the large scale distribution of mass in the universe.’
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