What is a comparison of two quantities with different units Group of answer choices?
A ratio comparing two quantities measured in different units.
What are the two quantities related to work?
Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy.
What factors does the kinetic energy of a body depend on?
The kinetic energy of a body or object depends upon its velocity and mass.
Is work a time based quantity?
Work is a time-based quantity; it is dependent upon how fast a force displaces an object. Superman applies a force on a truck to prevent it from moving down a hill. This is an example of work being done. A force acts upon an object to push the object along a surface at constant speed.
What is the formula for calculating energy?
Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.
How is work a scalar?
Work is a scalar quantity because it is the dot product of two vectors (Force and displacement). Dot product of two vectors becomes scalar quantity. So, work done has only magnitude but not direction.
Why is work done a scalar?
Work is nothing but the energy generated. Work has only a magnitude but no direction. The formula for work is written as a dot product of force and displacement. Therefore, work is a scalar quantity.
Why power is a scalar quantity?
Power is defined as the energy (or work) per unit time. Since, time is not considered as a vector quantity, and neither energy or work because the work is not directional. So yes, the power is a scalar quantity because it has a unit magnitude but no direction.
What is vector quantity example?
Examples of vector quantities include displacement, velocity, position, force, and torque. For example, a distance of 2.0 km, which is a scalar quantity, is denoted by d = 2.0 km, whereas a displacement of 2.0 km in some direction, which is a vector quantity, is denoted by →d .
Which is the following is not a vector quantity?
Velocity (v) is a vector quantity since it has both magnitude and direction. Its magnitude is the ratio of the displacement (d) of an object to the time (t) taken by the object to achieve that displacement. It has the same direction as the displacement. However, speed (s) is not a vector quantity.
Is position a vector?
The position of an object is given relative to some agreed upon reference point. Position is a vector quantity. It has a magnitude as well as a direction. The magnitude of a vector quantity is a number (with units) telling you how much of the quantity there is and the direction tells you which way it is pointing.
What is a vector quantity?
Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude.
Which one is not a vector space?
the set of points (x,y,z)∈R3 satisfying x+y+z=1 is not a vector space, because (0,0,0) isn’t in it. However if you change the condition to x+y+z=0 then it is a vector space.
Is WA vector space?
Theorem. If W is a subspace of V , then W is a vector space over F with operations coming from those of V .
Is a set a vector space?
An example of a vector space is the set of all real numbers, R, along with the usual kind of multiplication and addition. This is a set of numbers, but we also can talk about adding them and multiplying them by other numbers. The number 3 is an example of a vector in the above vector space.