Dimensions, vectors, flotation and deformation

Question 1 of 10

A body floats with 3/4 of its volume submerged in water. Its density is

A. 250 kg/m³ B. 1,333 kg/m³ C. 750 kg/m³ D. 1,000 kg/m³

Question 2 of 10

A spring with a force constant of 200 N/m is stretched by 5 cm. What force is needed?

A. 4 N B. 1,000 N C. 40 N D. 10 N

Question 3 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 4 of 10

Which of these is a vector quantity?

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

Question 5 of 10

A hydrometer is used to measure the

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

Question 6 of 10

The dimensions of power are

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

Question 7 of 10

Forces of 3 N and 4 N act at right angles on a body. What is the size of their resultant?

A. 7 N B. 1 N C. 5 N D. 12 N

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

A wire of length 2 m and area 1 × 10⁻⁶ m² stretches 1 mm under 100 N. Young's modulus is

A. 2 × 10⁸ Pa B. 2 × 10¹¹ Pa C. 5 × 10¹⁰ Pa D. 1 × 10¹¹ Pa

Question 10 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

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New set of questions

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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