MID TERM TEST FIRST TERM PHYSICS SS 1

FIRST TERM EXAMINATION 

           Class:  SS1                         Subject: PHYSIC                     Time:

1. Which of the following is the dimension for impulse?  (a) MLT−1  (b) MLT−2  (c) MLT (d) ML
2. A body accelerates uniformly from rest at 2ms-2. Calculate its velocity when it has travelled a distance of 9m. A. 3.0ms−1  B. 4.5ms−1 C. 6.0ms−1D. 18.0ms−1
3. Which of the following statements about matter is not correct

1. Molecules of solids move more freely than molecules of liquids and gases Molecules of solids are more closely packed than those of liquids                           C. Energy is required to break the intermolecular forces of attraction between molecules   D. Molecules of liquids move about within the liquid and they are in constant motion

1. A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?

1. Vertical acceleration on the ball decreases as it falls
2. The vertical force on the ball remains constant

III. The vertical speed of the ball increases as it falls

1. I only   B.II only  C. I and II only  D. II and III only

1. A body weighing 14N in air is partially immersed in water. If the mass of water displaced in the process is 200g, calculate the upthrust on the body. [g=10m/s2]   A. 2.0N  B. 3.0N  C. 3.5N  D. 7.0N
2. Which of the following processes is not a surface phenomenon? A. Condensation  B. Evaporation C. Photo Emission D. Thermionic Emission
3. A chemical balance is used for measuring         A. volume  B. mass  C. thickness D. density
4. A motorist travelling at 72kmh–1 had his eyes shut for 0.4s during a hard sneeze. Calculate the distance covered by him during this time interval. A. 50.0m  B. 28.8m  C. 18.0m  D. 8.0m
5. The angle at which a projectile must be fired to cover maximum range is  A. 30°  B. 45°  C. 60°  D. 90°
6. A body can undergo the following types of motion except  A. random     B. rotational  C. translational  D. relative
7. The energy stored in a spring of stiffness constant k = 2000Nm−1Nm−1 when extended 4cm is   A. 0.16J  B. 1.60J  C. 16.00J  D. 160.00J
8. Ice of mass 50g at 0°C was completely melted by 70% of the total heat energy supplied. Calculate the total heat energy supplied  [Specific latent heat of fusion of ice = 336Jg−1]     A. 2400J  B. 6800J  C. 7251J  D. 24000J
9. A plane is inclined at an angle θ to the horizontal. Its velocity ratio is   A. sinθ   B. tanθ  C. 1sinθ   D. 1tanθ
10. Which of the following devices converts light energy to electrical energy? A. Bulb  B. Television  C. Solar cell  D. Light emitting diode (LED)
11. A motor of a corn mill machine operates on electrical energy of 1.44×105J .If one-quarter of the energy is wasted on sound and heat, determine the efficiency of the machine.   A. 25%  B. 36%  C. 64%  D. 75%
12. Thermal energy added or removed from a substance that changes the state of the substance is called  A. latent heat  B. heat of reaction  C. calorimetry D. specific heat
13. The maximum density of water occurs at a temperature of  A. 0°C  B. 4°C C. 37°C  D. 273°C
14. A vapour whose molecules are in dynamic equilibrium with those of its own liquid is said to be  A. unsaturated  B. gaseous  C. saturated  D. diffused
15. A rainbow is formed when sunlight is incident on water droplets suspended in the air due to.  A. interference  B. refraction  C. dispersion  D. diffraction
16. Which of the following statements about the 3rd overtone of a vibrating air column of an open pipe is correct? It has  A. 4 nodes  B. 5 nodes  C. 3 antinodes  D. 4 antinodes

THEORY

1. Differentiate between fundamental and derived qualities 

1. List 7 fundamental qualities and 5 derived qualities you know
2. Give 5 differences between mass and weight 
3. List 3 instruments for measuring time and weight 
4. The period T of a simple pendulum depends on mass M, the length of thread L and acceleration due to gravity G with relation

T = KMxLYGz where k =2

                          Find x,y,z and write the formular relation

4. Define Force 
5. List the types of forces with 2 examples each
6. Calculate the frictional force of a block placed on a horizontal table. If the blocks placed on a horizontal table. If the block weighs 100g and coefficient of friction of the block and table is 0.5. (Take g = 10ms-1)  

       5.

The diagram above shows a 80kg block placed on an inclined plan included at 450 to the ground. Calc 

1. The force required to move the object parallel
2. The normal reaction 
3. The coefficient of friction