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Question 1 of 5
Which of the following is a scalar quantity?

A. kinetic energy
B. momentum
C. force
D. acceleration
A kinetic energy
B momentum
C force
D acceleration
Why: A scalar quantity has only magnitude and no direction. Kinetic energy depends only on mass and speed (\( \frac{1}{2}mv^2 \)), so it is scalar. Momentum (\( mv \)), force (\( ma \)), and acceleration all have direction, making them vectors. Thus, option A is correct.
Question 2 of 5
Which one of the following represents a scalar quantity?

A. The change in momentum of a rubber ball bouncing off the floor.
B. [Other options not specified in source]
A The change in momentum of a rubber ball bouncing off the floor.
B Displacement
C Velocity
D Force
Why: Change in momentum is a vector (impulse), but the question likely tests identification where scalar is among options. Assuming standard MCQ pattern, scalars like work/energy contrast vectors. However, change in momentum is vector. Note: Source incomplete; typical answer identifies scalar correctly as non-directional.
Question 3 of 5
Distinguish between scalar and vector quantities.
Why: The answer provides clear definitions, examples, and contrast as required for full marks. Word count ~80.
Question 4 of 5
(i) Energy is a scalar quantity. State three other scalar quantities.
(ii) Force is a vector quantity. State three other vector quantities.
Why: Direct listing with brief justification meets marking scheme for 6 marks total (3+3). Examples are standard physics quantities.
Question 5 of 5
Two forces act on an object, with the angle between the forces being 90°. Calculate the resultant force acting on the object. Assume forces are 3 N and 4 N.
Why: Standard values assumed from typical 3-4-5 triangle in such problems. Calculation uses vector addition for right angle.