Guess Questions Summative Assessment -II(2012-13) SET-01[FM=30]
1. Define 1 kWh.[1]
2. In an oscillating pendulum, at what positions the potential and kinetic energy are maximum ?[1]
3. A piece of stone is tied at one end of a rubber string and holding from other end, it is allowed to immerse partially then fully into water. What difference if any, you will observe, and why ?[2]
4. Differentiate between low and high pitch sound using neat and labeled diagram.[2]
5.An object of 40N weight when immersed in water losses 10N weight. Will the object float or sink why? [2]
6. What does acronym SONAR stand for ? What type of wave does it use?Write any two uses of SONAR. [3]
7. An object is made to fall from different heights 20cm, 40cm and 60cm on a wet sand.(a) What do you observe on the sand ? (b)Explain the reasons of the observations. [3]
8.A sound wave has a frequency of 5000Hz. and wavelength of 20cm. How long will it take to travel 1 km ? [3]
9. What do you mean by work ? Give an example of negative work done. What is the work to be done to increase the velocity of a car from 18km/hr to 90 km/hr if the mass of the car is 2000 kg ?[5]
10. State law of conservation of energy. An object of mass 10kg is dropped from a height 5m above the ground. Show that total energy of the object at the height 5m and 2m is same. (Take g=10m/s2). What happens to the energy when the object touches the ground ? [5]
Or,
(a) How do we define Power of a body. Also define 1 Joule. (b) State the transformation of energy taking place when (i) Green plants prepare their food. (ii) Head of a nail is hammered hard and it becomes warm. (c) With what velocity should a body of mass 4 kg be thrown so that it acquires 1.25 kJ of kinetic energy
For more practice visit:
Guess Questions Summative Assessment -II(2012-13) SET-02[FM=30]
1. Define 1 kWh.[1]
2. In an oscillating pendulum, at what positions the potential and kinetic energy are maximum ?[1]
3. A piece of stone is tied at one end of a rubber string and holding from other end, it is allowed to immerse partially then fully into water. What difference if any, you will observe, and why ?[2]
4. Differentiate between low and high pitch sound using neat and labeled diagram.[2]
5.An object of 40N weight when immersed in water losses 10N weight. Will the object float or sink why? [2]
6. What does acronym SONAR stand for ? What type of wave does it use?Write any two uses of SONAR. [3]
7. An object is made to fall from different heights 20cm, 40cm and 60cm on a wet sand.(a) What do you observe on the sand ? (b)Explain the reasons of the observations. [3]
8.A sound wave has a frequency of 5000Hz. and wavelength of 20cm. How long will it take to travel 1 km ? [3]
9. What do you mean by work ? Give an example of negative work done. What is the work to be done to increase the velocity of a car from 18km/hr to 90 km/hr if the mass of the car is 2000 kg ?[5]
10. State law of conservation of energy. An object of mass 10kg is dropped from a height 5m above the ground. Show that total energy of the object at the height 5m and 2m is same. (Take g=10m/s2). What happens to the energy when the object touches the ground ? [5]
Or,
(a) How do we define Power of a body. Also define 1 Joule. (b) State the transformation of energy taking place when (i) Green plants prepare their food. (ii) Head of a nail is hammered hard and it becomes warm. (c) With what velocity should a body of mass 4 kg be thrown so that it acquires 1.25 kJ of kinetic energy
For more practice visit:
Guess Questions Summative Assessment -II(2012-13) SET-02[FM=30]
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