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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?
动手实验：如何确定物体沿斜面滚动的平均速率？球体沿斜面滚动的时间如何依赖于斜面的高度？如果将斜面的高度加倍，时间是否会减半？
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.
假设加速度恒定，推导一组完整的运动方程，以描述满足此条件的任何运动。
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.
一个球以30 m/s的速度被向上抛出。求1秒后它的高度和速度。求它的最大高度。求它回到原高度时的总飞行时间。
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?
如果你同时从同一高度释放一个球并水平发射另一个球，它们会同时击中地面吗？
If you fire a bullet horizontally and drop another
simultaneously, which will hit the ground first?
如果你水平射击一颗子弹，同时释放另一颗子弹，哪颗会先落地？
Describe the motion of an object in free fall near
the surface of the earth.
描述一个物体在地球表面附近自由下落的运动。
Relate the basic set of motion equations to trajectory
motion, neglecting air friction.
将运动方程组与轨迹运动联系起来，忽略空气阻力。
How can you predict whether the baseball is going
to clear the fence? What do you need to know?
怎样才能预测棒球是否会越过围栏？你需要知道什么？
Georgia QCC, Grade 6 Standards
佐治亚州第六年级标准
如果你知道一个物体的加速度，如何在任意给定时间找到它的速率和行驶距离？（假设直线运动，加速度恒定。） |