Physics Final Exam Grade 11

I. Write True, if the statement is correct and false otherwise on the separate answer sheet provided.

1. Work is the dot product of force and displacement.
2. Rotational kinetic energy is a measure of an object’s resistance to change in its speed of rotation
   over a certain time.
3. Static equilibrium occurs when a body is at rest and there is no net force or net torque acting on it.
4. The critical point is where all the three states coexist together.
5. Turbulent flow occurs when there is no disruption between the layers.
6. Total pressure is constant along a stream line.
7. Deforming force is force acting on a body which produces change in its shape instead of its state
   of rest.
   II. Choose the correct answer from the given four alternatives.
8. A force F at an angle above the horizontal is used to pull a heavy suitcase of weight mg a
   distance d along a level floor at constant velocity. The coefficient of friction between the floor
   and the suitcase is N. the work done by the frictional force is:
   A. -Fdcos C. –Nmgd
   B. -NFdcos D. – Nmgdcos
9. A football is kicked off the ground a distance of 10m downfield. Neglecting air resistance,
   which of the following statements would be INCORRECT when the football reaches the highest
   point?
   A. The ball’s original kinetic energy has been changed into potential energy.
   B. The ball’s horizontal velocity is the same as when it left the kicker’s foot.
   C. The ball will have been in the air one half of its total flight time.
   D. The vertical component of the velocity is equal to zero

III. Answer the following questions.
31.Explain briefly the difference between stable and unstable equilibrium.

32. State briefly the law of conservation angular momentum.
    33.Mention at least two application of Pascal’s law
    34.Mention at least four application of Bernoulli’s principle
    IV. Fill in the blank space with appropriate words or phrase.
33. Is a body that can rotate with all the parts locked together and
    without any change in its shape?
    36.A type of equilibrium that occurs when a body is moving at a steady velocity and there is no
    net force or net torque acting on it is .
34. is a theoretical object that absorbs all electromagnetic radiation that hits
    it.
    V. Workout, show the steps clearly.
    38.An automobile engine develops 200Kw when rotating at a speed of 3,600 rev/min. What
    torque does it deliver?
    39.The system in figure below is in equilibrium, A mass of 225kg hangs from the end of the
    uniform strut whose mass is 45kg. Calculate