英语翻译When an object is not moving ,it is at rest.It will stay that way unless something makes it move.The power that makes other things move is called a force.A force can be a push or a pull.It changes the object's position.When aforce moves a
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英语翻译When an object is not moving ,it is at rest.It will stay that way unless something makes it move.The power that makes other things move is called a force.A force can be a push or a pull.It changes the object's position.When aforce moves a
英语翻译
When an object is not moving ,it is at rest.It will stay that way unless something makes it move.The power that makes other things move is called a force.A force can be a push or a pull.It changes the object's position.When aforce moves an object toward it,that is called a pull.You can use the pushes and pulls to move objects.
A soccer player sees the ball coming towards him.He can use a pushto make it go where he wants it to go.In this case,the push is a kick.A little girl wants to give her toy a ride iin her little red car.She uses a pull to make the car move along after her.
Every push and pull takes energy.The amount of energy and strength you need to move an object depends on how big the object is.Large objects need a large force to move them.Small objects only need a small force to move them.
英语翻译When an object is not moving ,it is at rest.It will stay that way unless something makes it move.The power that makes other things move is called a force.A force can be a push or a pull.It changes the object's position.When aforce moves a
当一个对象是不动的,它是在休息.它将保持下去,除非有东西使它移动.电源,使其他移动的东西叫做力.力可以是推或拉.改变对象的位置.当力移动一个对象向它,那叫做拉.你可以使用推拉移动物体.
一个足球运动员把球向他走来.他可以用普什图语让它去他想去的.在这种情况下,推是踢.一个小女孩想把她的玩具坐在她那辆红色的小汽车.她用一把让车走后她.
每一个推拉需要能量.能量和强度,你需要移动一个对象的数量取决于对象有多大.大对象需要一个大的力来移动他们.小物体,只需要一个小的力来移动他们.
当物体不运动时,它便处于静止状态。它将一直保持静止,除非外界物体使它运动。促使其他物体运动的能力叫做力。力分为拉力和推力。力可以改变物体的位置。当一个力朝着施力物体的方向移动其他物体时,叫做拉力。拉力和推力都可以用来移动物体。
一个足球运动员看见一个球正朝他运动。他可以施加一个推力让球向任意方向移动。在这种情况下,推力即为踢力。一个小女孩想让他的玩具搭上她的小红车。她施加了一个拉力使得小车...
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当物体不运动时,它便处于静止状态。它将一直保持静止,除非外界物体使它运动。促使其他物体运动的能力叫做力。力分为拉力和推力。力可以改变物体的位置。当一个力朝着施力物体的方向移动其他物体时,叫做拉力。拉力和推力都可以用来移动物体。
一个足球运动员看见一个球正朝他运动。他可以施加一个推力让球向任意方向移动。在这种情况下,推力即为踢力。一个小女孩想让他的玩具搭上她的小红车。她施加了一个拉力使得小车跟着她往前走
每个拉力或推力都消耗能量。移动一个物体所需的能量和力取决于物体的大小。质量大的物体需要更大的力来移动,小物体则需要较小的力
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