A. Force. B. Velocity. C. Momentum. D. Acceleration. 相关知识点: 试题来源: 解析 C。解析:The law of conservation of momentum states that in an isolated system, the total momentum remains constant.(动量守恒定律指出在一个孤立系统中,总动量保持不变。)反馈...
Any object moving on a circular path will never have a constant velocity because the direction of the object changes every instant. However, the object may have constant speed. Notice that from the definition of velocity, you can see that a velocity is changing whenever the speed, the ...
What the Constant Velocity Model Can Teach Us About Pedestrian Motion Predictiondoi:10.1109/LRA.2020.2969925Christoph SchollerVincent AravantinosFlorian LayAlois KnollIEEEInternational Conference on Robotics and Automation
百度试题 结果1 题目 An object with a mass of 5kg is moving at a constant velocity of 10m/s. What is the net force acting on the object? A. 10N B. 20N C. 30N D. 0N 相关知识点: 试题来源: 解析 D 反馈 收藏
In summary, the conversation discusses the calculation of work and power while pushing a 10 kg box up a rough ramp at a constant speed of 2 m/s. The rate of work done on the box by the person pushing is determined by the formula P=Fv, where F is the force and v is...
Answer to: What is your average velocity if you drive a distance of 345 km at a speed of 45 km/h, then the same distance at a speed of 70 km/h? By...
At a given moment we observe the speedometer and observe that the velocity is 40 mph. This physical dimension is called instantaneous speed.Answer and Explanation: Instantaneous velocity. Consider a mobile that has a displacement {eq}\Delta \vec x {/eq} in time interval {eq}\Delta t {/...
A racer accelerates from rest to a speed of 287 km/h in 6.8 seconds. What is its average acceleration? If a car moves with a constant velocity, does it also move with a constant speed? A car accelerates at 20 m/s2 to a velocity of 70 m/s. It covers 30 m in...
Velocity is defined as a vector measurement of the rate and direction of motion or the rate and direction of the change in the position of an object.
The view thatvelocityis constant is a source of contention among Keynesians, some of whom believe that velocity is not so since the economy is volatile and subject to periodic instability. Instead, Keynes'liquidity preference theoryemphasizes how changes in money demand (and thus velocity) influence...