## Chapter 2: Motion and its Causes

Hands on: How can you determine the average speed of an object rolling down an incline? How does the time to roll a sphere down an incline depend on the height of the incline? If you double the height of the incline, does it cut the time in half?

If you know the acceleration of an object, how do you find its speed and distance traveled at any given time? (Assume straight-line motion, constant acceleration.)

Assuming constant acceleration, show a complete set of motion equations which will describe any motion meeting this condition.

A ball is thrown upward with a velocity of 30 m/s. Find its height and velocity after 1 second. Find its maximum height. Find its total time of flight when it reaches its original height.

If you drop one ball and launch another horizontally at the same time from the same height, will they hit the ground at the same time?

If you fire a bullet horizontally and drop another simultaneously, which will hit the ground first?

Describe the motion of an object in free fall near the surface of the earth.

Relate the basic set of motion equations to trajectory motion, neglecting air friction.

How can you predict whether the baseball is going to clear the fence? What do you need to know?

 9 10

*Motion equations

*Motion calculation

*Solving equations

*Motion explorer

*Vertical trajectory

*Free fall

*Horizontal trajectory

*Bullet drop

*Vertical trajectory

*Free fall

*Motion equations

*Trajectory equations

*Clearing the fence

*Trajectory over flat ground

Index
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