The average speed of a round trip journey [one where you end at the same locatio

Question

The average speed of a round trip journey [one where you end at the same location in space where yo began] is always zero The magnitude of the velocity of a projectile in freefall is constant throughout its trajectory, though the horizontal and vertical components may change magnitude over time. An object in freefall will continue to accelerate unless acted on by an additional force other than gravity. Gravity is a conservative force. In a collision, if momentum is conserved then so is mechanical (kinetic) energy, in all cases. For a satellite in a circular orbit about the earth, the Earth's gravitational force provides the centripetal force responsible for the satellite's circular orbital motion. A ball spun around on the end of a massless string has twice the angular momentum as an identical ball spur around at half the string length BUT the same angular speed. Assuming your feet have the same area (as each other), when you stand on one foot you exert twice as pressure on that foot than when you stand normally on two feet.

Explanation / Answer

1.

Average speed of a round trip journey is always is zero : TRUE

2.

TRUE

3.

TRUE

4.

TRUE

5.

FALSE

if collission is elastic momentum conserved but in inelastic collission it not conserved

6.

TRUE

7.

FALSE

8.

TRUE

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