The topic here is inertia, the idea behind Newton's first law.
13[1 mark]
Choose the meaning of inertia.
See how you would score on Newton's Laws of Motion
Our own questions on this topic, marked straight away, so you see what to revise. Free now.
How hard it is to alter the object's density
How hard it is to alter the object's mass
How hard it is to alter the object's velocity
How hard it is to alter the object's weight
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Inertia is the tendency of an object to keep moving as it is, or to stay at rest. It measures how hard it is to change the object's velocity, by speeding it up, slowing it down or turning it. That is the third option. The larger the mass, the greater the inertia. Density, mass and weight are properties of the object, and a force on it does not aim to change them, so the other three options fail.
1 mark
How the marks are earned
- Choose how hard it is to alter the object's velocity: inertia is the resistance to a change in motion, in speed or direction.
- One answer only: two answers earn nothing, and a circled or underlined right option counts if the box is blank.