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Câu hỏi trắc nghiệm Lớp 12

<p>Một vật chuyển động thẳng được xác định bởi phương trình <img src="data:image/png;base64,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">, trong đó <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAQCAYAAAAvf+5AAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADGSURBVChTvY+hDoJQFIZNVBp2ivAOBHkLCi9DoiAbFTekayOT8QEYIzAKYmdsl/brvGcHb9Lg/Nr9zrd7z93gS/4UFkWBuq7pJFFCIQTyPIfjOBiGG1kJh/M8IwxDaJoGy9qhqq40kXC4LAtOWQZd15GmR4zjnSYS5elDFMHYGpimiczK240CrruH7/tkVDhsmua13/lyIaPCYRzHsG37+YkKfd+TXeHQ8zyYpokkSdB1HdkVDsuyRBAEaNuWjAqHn/h1CDwA6DJQ3qJUlnMAAAAASUVORK5CYII="> được tính bằng giây và <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACMAAAAZCAYAAAC7OJeSAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAQpSURBVEhL3ZZrSJtXGMdNV/CLCLWTVTpYYcYMW1ttuxWspfvSGRRaB1NTwZCW7lvbYVLpkGmdDjIU8YOagCNlWRetZGiFtq5CilAVTRWmFbxkrZd5TZwXvBv1v3Pe96m5vLEd0w9lv095/u/JOf/3nOd5zhuEd4j/p5nh4WFMOZ0USXG73ejr68PGxgYpUvbETFNTE65fv4FXg4OkSOFmKioqUFBQgPX1dVJ9eaOZ2dlZTE9PUwRsbm7SLw8vul9AmahEa2srKTuzsLAAdWYm9PofSfEloBluICsrC4mJiVCpVNDpdKisrMRdkwlbW1s0ipljW56Scgl5d+6Q8nb+dDgQFxeHlgDmJWZWlpeRlJSEEydi0djYiK6uLhQXFyE4OBi5eXk0SqShoQFRcjn6+/tJkbKysoLV1VWKRDIyMpDOXtIfiZmW5mbsf28/24mfSBFRZ6pR9+ABRSKpqV8h/uxZiqSMj43h29u34XK5SBGpqqrCB4cO4Q/2ot5IzLS1tSEoSCYcj3ei1dfXY2TkL4qAifFxyNmuXLv2NSke+P86OzuRzHY4OTlZ2B1venp62BpBKCsrI0VEYoZPlHH5sjA4OzubJa2YI965wrE9tSEkJARFRcWkeOjr7cWlixeFOa5cvYpeFnszMTGB8IMHodFc8Zk3YAI7p6agVCqFybRaneTMOWbzz8Jzk+kuKR7W1taQfesW3g8Px/DIiBB7wwtEESVHQsI5LC4tkbqDGY6TNbBzCQnCgnq9nlQPpaWlwrPa2jpSPPAS5hWj0WhI8WVubg6nTp5EdHQ0ZmZmSPUywzuj3W7HGEu61wyyJiaP/BgHDoRhYGCAVJGSkhLBzMOHj0jx8JzNI5PJUF1dTYovi4uL+Pz8eSgUn2Dm7wBmuEOtVivJ8B8KC4VFW1p8+0J5ebmgm82/kOIhn/Wdj44cYQk/Qoov82xnPj19GseOxQiN9TXbZkZHRxEZGQmr9TdSRFTp6Yg+ehRTLI+8sVqt2CfbB4PBSIqI272OuNhYqFgR2O3PJWXNmWYa708XLnzhU2nbZppZfzl8+EOhtZvNZthsNhSyeySGuX/86DGN8tDe3o6wsDDk5OSQIuJyOREREYHPzpyBxVIl5I8/PBVCQ0Nx8+Y3pIhsm+E50d3djY6ODlYhJqEHGAwGOFj7DgQ/91i2AykpX5Iiwi/Emvv3ce/er1hm3TwQvAfxI7ZYLKSIbJv5L+h0WhyPOc62Wlr6b8LIXjIqSiHJqV2ZcTgGWEUo8PuTJ6T8O/jd539EnF2Z4eTmfoe0tDSK3k7zs2eIj4/H0NAQKR52bUb4RlGrWY6VSzqtP69evmSXaypq66SNkrNrM5zJyUl8n58vfFbuBDdqNBpRU1NDipQ9McPhiy153TP+8A4/Pz9PUWD2zMxe8A6ZAf4BTNhrhquM3QUAAAAASUVORK5CYII="> được tính bằng mét. Gia tốc tức thời của vật tại thời điểm vận tốc bằng <img src="data:image/png;base64,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"> là</p>