A car is moving on a straight road at a constant speed. Suddenly, the driver takes hi
A. There are no forces acting on the car. B. The forces are balanced. C. There is only one force acting on the car. D. The forces are unbalanced. 相关知识点: 试题来源: 解析 B。解析:车以恒定速度在直路上行驶,说明合力为零,即作用力平衡。选项 A 错误,有重力、支持力等力作用。选项 C...
A car is moving on a straight road. The engine provides a force of 2000 N. The frictional force is 500 N. What is the net force acting on the car? A. 1500 N B. 1600 N C. 1700 N D. 1800 N 相关知识点: 试题来源: 解析 A。Net force = Force by engine - Frictional force ...
on the ground在地上;in the field在田野里;car汽车;traffic交通;根据搭配,故选B。 (6)考察介词辨析。固定搭配:on the ground在地上,故选C。 (7)考察动词短语辨析。put up张贴,建起;look up向上看,查找;give up放弃;pick up捡起;根据句意:他看见一个钱包在地上,捡起来。故选D。 (8)考察动词辨析。
A car is moving along a straight road. When /=0. the car passes a point A with velocity 10ms-and this velocity is maintained until /= 30s. The driver then applies the brakes and the car decelerates uniformly, coming to rest at the point B when /= 42s.Sketch a velocity-time graph...
3. A car travels on a straight road with a constant acceleration of 2 m s2 and its initial velocity is 10 m s'. After T seconds, its speed is 24 m s-', find the value of T and the distance travelled during these T seconds. 相关知识点: 试题来源: 解析 http://gallery.fbconte...
2 A car is travelling on a straight level road. Fig. 2.1 shows two horizontal forces that act on the car. Force P is caused by air resistance and friction.force P force Q←Fig.2.1(a)The forward force Q and the backward force P are equal.Describe the motion of the car..[1](b)Th...
When a car is moving at a constant speed on a straight road and suddenly stops, the passengers will move forward due to ___. A. gravity B. friction C. inertia D. air resistance 相关知识点: 试题来源: 解析 C。中文解析:当汽车在直路上以恒定速度行驶突然停止时,乘客会由于惯性向前移动。
Starring not-yet-famous James Taylor and Beach Boys drummer Dennis Wilson, "Two-Lane Blacktop" (1971) is an existential film that cruises the open road to the tune of Easy Rider. The instant cult-classic, directed by Monte Hellman, depicts the two drifters on a cross-country trek, heading...
On the afternoon of October 20, a harrowing car accident unfolded at an off-ramp of the overpass on Optics Valley Avenue in Wuhan. A driver lost consciousness behind the wheel following a sudden medical emergency, causing his car to crash straight into the guardrail before cruising down the ov...