结果1 题目 Why is velocity a vector quantity?B A It acts on a body in a straight line. B It has direction and size. C It has direction but no size. D. It is a change of speed. 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
Velocity is a vector quantity: it has both magnitude and direction. Speed is the magnitude of the velocity: no direction is associated with speed. 2. (b) 3. (c) 4. 144 ft; 96 ft/s downward; zero 5. 4 s; 12 ft 6. 450 m/s2 7. The magnitude of A→+B→ is 32 units and ...
Velocity is a vector quantity (because it has magnitude as well as direction). For example, the expression ’25 km per hour7 is the speed (because it has magnitude only), but the expression 25 km per hour towards North (or any other direction) is velocity (because it has both magnitude...
Velocityis avectorquantity that indicates displacement, time, and direction. Unlike speed, velocity measuresdisplacement,a vector quantity indicating the difference between an object's final and initial positions. Speed measures distance, a scalar quantity that measures the total length of an object's ...
On the other hand, Velocity is a vector quantity, meaning it has both magnitude and direction. This distinction makes Velocity more descriptive as it indicates not just the rate of movement but also where the object is headed. 10 When we say a car has a Speed of 50 mph, we're merely ...
A series of free GCSE/IGCSE Physics Notes and Lessons. Speed Describe the difference between distance and displacement. What is meant by speed. How to calculate speed? How to calculate distance travelled? Velocity Describe what is meant by velocity? Explain why velocity is a vector quantity. ...
Velocity is a vector quantity that denotes “the rate at which an item changes location.” Consider a person who takes one step forward and one step back at a quick pace, constantly returning to the same starting place. While this would cause a flurry of activity, it would also result in...
Velocity is a VECTOR quantity –it has magnitude & direction. Average Velocity is the displacement of an object divided by the time interval. SPEED VELOCITY 9 Equations SPEED VELOCITY 10 Problem Solving RULES:Must draw a picture (motion diagram) that includes vector arrows representing speed/ve...
Velocity, one of the most basic measures in mechanics, is a vector quantity, which means that it contains both a magnitude and direction. The directional constituent of velocity makes it distinct from speed, which does not contain a direction; however, both measures describe how fast a body is...
velocity is known as avectorquantity and cannot be specified completely by a number, as can be done with time or length, which are scalar quantities. Like all vectors, velocity is represented graphically by a directed line segment (arrow) the length of which is proportional to its magnitude....