Dimensions, vectors, flotation and deformation

Question 1 of 10

Which of these is a vector quantity?

A. speed B. displacement C. mass D. energy

Question 2 of 10

A spring of force constant 200 N/m is stretched 0.1 m. The force applied is

A. 0.0005 N B. 2,000 N C. 20 N D. 200 N

Question 3 of 10

The law of flotation states that a floating object

A. displaces its own volume of fluid B. has no weight C. displaces its own weight of the fluid in which it floats D. is always denser than the fluid

Question 4 of 10

The dimensions of power are

A. MLT⁻² B. ML²T⁻² C. ML²T⁻³ D. ML²T⁻¹

Question 5 of 10

The dimensions of force are

A. LT⁻² B. MLT⁻¹ C. ML²T⁻² D. MLT⁻²

Question 6 of 10

A hydrometer is used to measure the

A. mass B. pressure of gases C. temperature D. relative density of liquids

Question 7 of 10

Hooke's law states that extension is proportional to

A. length only B. load, within the elastic limit C. mass squared D. temperature

Question 8 of 10

Two forces of 6 N and 8 N act in opposite directions. Their resultant is

A. 10 N B. 14 N C. 2 N D. 48 N

Question 9 of 10

What are the dimensions of force?

A. ML²T⁻² B. MLT⁻¹ C. MLT⁻² D. MT⁻²

Question 10 of 10

Two forces of 5 N and 12 N act at right angles. The angle the resultant makes with the 12 N force is about (tan⁻¹ 0.417 ≈ 22.6°)

A. 30° B. 67.4° C. 45° D. 22.6°

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Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.

Past questions, worked solutions and curriculum-mapped study material for JHS and SHS students and teachers in Ghana.

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