61The maximum height reached by a projectile mainly depends on its initial what?
62An object moving in a circular path requires a centripetal force directed which way?
63Which force is primarily responsible for keeping planets in orbit around the Sun?
64In a perfectly elastic collision, both momentum and what other quantity are conserved?
65In an inelastic collision, kinetic energy is generally not conserved because some is converted into what?
66Impulse experienced by a body is equal to the change in its what?
67Impulse can also be calculated as the product of force and what?
68Density of a substance is defined as its mass divided by what?
69What is the SI unit of density?
70Between a heavier and a lighter object, which one has more inertia?
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