# Questions tagged [inertia]

Inertia is the tendency of a body to oppose changes to its state of motion. DO NOT USE THIS TAG for moment-of-inertia!

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### Influences on wavefunction path analysis

I was looking at simulations of a wave going through a slit. When the wavelength was much smaller than the slit width, the wave went through the slit and kept going straight like a laser beam. But ...
1k views

### A bullet makes a hole but a rock shatters the glass

Consider a bullet fired toward a pane of glass. Barring slight cracks, it creates a relatively clean hole in the glass. On the other hand, when a stone is projected toward the same glass pane, it is ...
184 views

### Golf ball curving to right or left when putting along a slope

I will use the example of a golf ball here, but there are many other examples I guess. My question is: A golf ball is at rest on an incline that slopes from right to left. I take it the force from ...
531 views

### Is it necessary that the path of an object in uniform motion is a straight path? [closed]

What does the path of an object look like when it is in uniform motion?
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### If inertial mass were equal to for example half of gravitational mass why would things not still fall at same rate?

I have read that it is the equality of inertial and gravitational mass that causes all objects to fall at the same rate irrespective of size. But if this were not true, what effect would we see? Would ...
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### Bidirectional jerk motion on a stopping vehicle

A stopping vehicle (say a car) has an apparent retardation (which may/may not be constant in magnitude) when force via brakes is applied. I travel by subway trains, and I noticed an odd phenomenon. ...
953 views

### When Does Mass Matter? [closed]

I have been trying to wrap my head around this idea for a month or so, and I am not really sure how mass plays into the velocity of a moving body. I have not taken physics in a while, but one thing I ...