A : for a moving particle distance can never be negative or zero.
R : Distance is a scalar quantity and never decreases with time for moving object.
Which quantities can be negative?
As discussed above, velocity is a vector quantity that can be negative. So option 3 is correct.
Can speed be negative in physics?
As neither time nor distance covered by a body can be negative, therefore, speed also cannot be negative.
Can a distance be negative?
The distance can never be zero or negative. Distance will not decrease. Distance is a scalar quantity which has only magnitude. Was this answer helpful?
Is velocity can be negative?
Velocity: The velocity of an object is the change in position (displacement) over a time interval. Velocity includes both speed and direction, thus velocity can be either positive or negative while speed can only be positive.
Which variables can never be negative Mcq?
Continuous variables It can’t be negative and it can’t be higher than three metres.
Can a scalar be negative?
Now, as the real numbers include both, positive numbers as well as negative numbers, a scalar can be negative. Now, in physics, the magnitude of a physical quantity is expressed by some magnitude or say numerical value and a unit.
Can vector quantities be negative?
No, the magnitude of a vector is always positive.
Can dot product be negative?
Question: Can dot product be negative? Can it be zero? Answer: The dot product can be any real value, including negative and zero. The dot product is 0 only if the vectors are orthogonal (form a right angle).
Is acceleration can be negative?
Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.
Can you have negative mass?
In our universe, there is no such thing as negative mass. Mass only comes in positive form. In contrast, electric charge can be positive or negative. The nonexistence of negative mass has profound consequences.
Is speed can be zero or negative?
Speed is a scalar quantity and only have magnitude which cannot be negative. It can either be positive or zero.
Can the momentum be negative?
Momentum can be negative. Momentum is a vector quantity, meaning it has both magnitude and direction. In physics, direction is indicated by the sign, positive or negative. Negative quantities move backwards or down, whereas positive quantities typically indicate the object is moving forward or up.
Is kinetic energy can be negative?
The kinetic energy of a body cannot be negative because the mass cannot be negative and the square of the speed gives a non-negative number. However, the change in kinetic energy can be negative. Was this answer helpful?
Is acceleration can be zero?
Acceleration of an object can be zero when it is moving with a constant velocity. Since velocity is constant, there will be no change in velocity and so there will be no acceleration.
Which variable can never be negative in operation research?
Solution : The variables of objective function of the LPP can never take negative values, therefore these variables are zero or positive.
Can surplus variables be negative?
A surplus variable is the difference between the total value of the true (decision) variables and the number (usually, total resource available) on the right-hand side of the equation. Thus, a surplus variable will always have a negative value.
Can slack variables be negative?
Slack variables are used in particular in linear programming. As with the other variables in the augmented constraints, the slack variable cannot take on negative values, as the simplex algorithm requires them to be positive or zero.
Is vector positive or negative?
A vector can be both positive and negative. A negative of a vector represents the direction opposite to the reference direction. It means that the magnitude of two vectors are same but they are opposite in direction.
Can energy negative?
Even if the matter is somewhat more complicated than previously thought, energy cannot be obtained from nothing, even though it can become negative. The new research results now place tight bounds on negative energy, thereby connecting it with quintessential properties of quantum mechanics.
Can there be negative work done?
Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.
How can a scalar quantity be negative?
- Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
- Generally, scalars in the physical world are positive, but some scalars like electric charge and temperature have a negative value.
- In conclusion, we can say that scalar quantity can be negative.
Can orders of magnitude be negative?
Explanation: In one meaning, it is a number’s nearest power of 10. For example, 9.9×102 is much closer to 103 than to 102 , so we say that the order of magnitude is 3 . By the same argument, 9.9×10−3 is closer to 10−2 than to 10−3 , so we say that the order is −3 .
What is a vector quantity?
Vector Quantity Definition The physical quantities for which both magnitude and direction are defined distinctly are known as vector quantities.
Can vectors have negative angles?
Secondly, the angle between vectors is considered as measured from the first vector counterclockwise to the second vector with the convention that if the angle goes beyond 180, then 360 is to be subtracted from it, making it negative.