G10, Physics First Semester Test Time Allowed (45)minutes

Answer All Questions

- Fill in the blanks. (5 marks)

(1) The value of gravitational constant is ………. .m3kg-1s-2.

(2) A unit vector has the magnitude of ………. unit.

(3) Since displacement has both ………. and direction, displacement is a vector quantity.

(4) 1 N force acting horizontally on a body of mass 1 kg gives it an acceleration of ……… .

(5) The unit of work in British system is ………. . - Define “work”? A child pulling a toy car with a 10N force. The direction of the force makes an

angle of 20° with the horizontal plane. If the car moves 6 m, how much work does the child do?

3.Define the coefficient of volume expansion. A heat resistance glass at 15℃ is fully filled

with 250 cm3 of glycerine. If the temperature increase to 25 ℃ how much glycerine overflows? The

coefficient of volume expansiomove a wooden box or a big stone? Why?

5.Is if correct to describe Newton’s second law in symbols as F α a?.

A 3 ton car moving with the velocity of 30 mi h-1 is brought to stop in 2 s. Find the resisting force of the

brakes acting on the car.

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