PERIODIC TEST
CLASS - 9 SUBJECT - PHYSICS
1. Define acceleration and give its SI unit.(1)
2. Write difference between scalar and vector quantity.(2)
3. Write the difference between weight and mass.(2)
4. What is Universal
law of Gravitation?(2)
5. Drive F=ma.(3)
6. Drive first equation
of motion.(3)
7. Why it is advised to tie the luggage kept on the roof of the bus?(3)
8. (A) An automobile vehicle has a mass of 1500
kg. What must be the force between the vehicle and road if the vehicle is to be
stopped with a negative acceleration of 1.7 ms–2? (3)
(B) Define free fall.(2)
9. (A) A stone is
released from the top of a tower of height 19.6 m. Calculate its final velocity
just before touching the ground?(3)
(B) Define inertia.(2)