CBSE Guess > Papers > Important Questions > Class IX > 2010 > Science > Science By Mr. Tejendra
CBSE CLASS IX
Q . 1. Define SI unit of force.(1)
Q . 2. A body is moving with a uniform speed of 15 m/s on a circular track. Why is its motion called acceleration motion.(1)
Q . 3. What is the distance travelled and displacement of a body as its moves from A to B via C.(2)
Q . 4. A motor boat starting from rest on a lake accelerates in a straight line at a constant rate of 2m/s2 for 4 seconds. How far does the boat travels during this time.(2)
Q . 5. Name the force which keeps various planets in their orbits. Write down the formula for the force which exists between two bodies of mass m1 and m2 separated by a distance R from each other.(2)
Q . 6. State Newton’s second law of motion. A ball is thrown on a smooth surface with a force and it stops after some time. Is it supporting First law of motion. Give reasons for your answers.(2)
Q . 7. Velocity-time graph of a body is given above. Answer the following questions (3)
- Which part of the graph shows uniform acceleration.
- Which part of the graph shows uniform retardation.
- Calculate the total distance travelled by the body.
- Which part of the graph shows zero acceleration.(3)
Q . 8.
- Derive the first equation of motion v=u + at graphically.
- Write the equation describing the principle of conservation of momentum.
- Why does the Gun recoil when a bullet is fired from it. (5)
Paper By Mr.Tejendra
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