结果1 题目 A 1000kg car moving at a constant velocity of 11.0m/s strikes a concrete barrier and comes to a complete stop in 2.0s. What is the force acting on the car? A −5500 N B -180 N C 5500 N D 180 N 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
3 A car is moving at a constant velocity of 15 ms'. The driver applies the brakes and the car decelerates to rest at a constant rate.The velocity-time graph for the final six seconds of the car's journey is shown.207W 目1510500 1 2 3 4 5 6 7Time / s The distance the car tra...
A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for 1 km.What is the average speed of the car? The average speed of an object: The average speed of an object is defined as the total distance traveled by the object ...
A mass of 47 kg is moving horizontally as a force of 190 N, directed at 25 deg below the horizontal, is exerted on it. When its speed is 7.3 m/s, what is the rate at which the force is doing work? An object with...
following each other without overtaking and led by a car moving with constant velocity. This is because, on the one hand, as claimed by Daganzo et al., “no empirical studies to date describe the complete evolution of a disturbance” and thus we cannot “explain the genesis of the disturban...
(i) if no force, then constant velocity in straight line OR force is neededto change directionbody moving in circle is changing direction/velocity/acceleratingSO force is needed(i) towards centre (of circle)/at right angles to motion/inwards(ii) friction between tyres and road/reaction from ...
a.Draw a velocity-time graph to represent the motion of the car. b.What is the acceleration of the car in first5seconds? c.What is the retardation of the car in final3seconds? What is the force on5kg mass when ...
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transmission shafts, when a transmission member abuts on the bottom of an end wall due to application of a load in a shaft direction, and the propeller shaft of an automobile including the constant velocity joint, capable of generating breakage of the propeller shaft near the constant velocity ...