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Syllabus
How did we arrive at 3l2delta l ? Please show the working.
4. The above graph shows the velocity time graph of a particle of mass 100 g moving in a straight line. Calculate the force on the particle.
5. (a) Name two substances which contract on heating.
Q2. Define work and give its SI unit.
Q3. Write the expression for the work done by constant force acting on a body, which gets displaced from its initial position in a direction different from the direction of force.
Q4 How is work done related to the applied force ?
Q5. Give an example when work done by a force acting on a body is zero even though the body gets displaced from its initial position by the application of the force.
Q6. What is the angle between force and displacement for (i) zero work and (ii) positive work ?
Q7. Give an example of (i) zero work (ii) positive work and (iii) negative work.
Q8. From the ground floor, a man comes up to the fourth floor of a building using a staircase. Another man comes up to the same floor using an elevator. Neglecting friction, compare the work done in the two cases.
Q9. Under which two conditions will work done be zero?
Q10. When a body moves in a circular path, how much work is done?
Q11. Define one joule.
?) which is the good conductor of heat
?) How is oneled tot he above conclusion
Q6. What is the angle between force and displacement for :
(i) zero work and (ii) positive work ?
Q.8. From the ground floor, a man comes up to the fourth floor of a building using a staircase. Another man comes up to the same floor using an elevator. Neglecting friction, compare the work done in the two cases.
Q.11. Define one joule.
Concept of Temperature
Plz give me answer fast very urgent
Q3. Write the expression for the work done by constant force acting on a body, which gets displaced from its initial position in a direction different from the direction of force.
Q5. Give an example when work done by a force acting on a body is zero even though the body gets displaced from its initial position by the application of the force.
Difference between heat and temperature (4points)-4 points
Q.10. When a body moves in a circular path, how much work is done?
Q.E8. A boy pulls a toy car with a force of 50 N through a strng which makes an angle of 30 with the horizontal, so as to move the toy by a distance of 1 m in the horizontal direction. If the string were inclined at an angle of 45 with the horizontal, how much pull would he apply along the string in order to move it through the same distance of 1 m?
Q.9. Under which two conditions will work done be zero?
Q1. Is work a scalar or a vector quantity ?