While travelling down a country road a motorist finds that she experiences a momentary feeling of weightlessness as the car crests a small hill. Assuming that the hill has a radius curvature of 64m what was the speed of the car?

The acceleration of an object is not zero at the top of its flight, because the acceleration of gravity on the object does not change.

When was the first airplane made?

If you walk 15m west and 7m east. what is your displacement?

Does adding a neutron to an atom's nucleus makes it an ion?

A proton is moving toward a stationary charged particle. Which statement correctly describes an energy change that could occur as the particles get closer? A.

Which of the following objects has the greatest inertia? a. baseball b. bowling ball c. pencil d. toothpick

What change occurs to the mass of an object when an unbalanced force is applied to it? A. The mass increases. B. The mass decreases. C. The mass remains the same. D. The mass reduces to zero. E. The mass changes by an indeterminate amount.

Which of the following objects has the most kinetic energy? a car going 60 miles per hour a spring that is compressed a rock sitting on the edge of a cliff a bicycle going 10 miles per hour

On the Celsius scale what temperature does water boil

Suppose that, while lying on a beach near the equator of a far-off planet watching the sun set over a calm ocean, you start a stopwatch just as the top of the sun disappears. you then stand, elevating your eyes by a height h = 1.