1st Term Examination Physics SS 1

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1st Term Examination

PHYSICS

SS 1

Section A

Answer all questions correctly

OBJECTIVE QUESTIONS

1. __________ is the quantity of matter in a body? (a)weight (b)mass (c)force (d)motion
2. Which of the following is not a type of contact force? (a)push (b)pull (c)magnet force (d)frictional force
3. The force that opposes motion is called? (a)frictional force (b)moving force (c)breaking or stopping force (d)coefficient
4. What will be the weight of an object whose mass is 20kg when acceleration due to gravity is 10/s²? (a)30m/s (b)200m (c)200N (d)30N
5. The unit of mass is _________ (a)Newton (b)metre (c)kilogram (d)kilometre
6. Which of the following is not a career opportunity in Physics? (a)accelerator Physics (b)marketing (c)metrology (d)material Physics
7. Time is an example of (a)derived quantity (b)fundamental quantity (c)fundamental unit (d)derived unit
8. The dimension for velocity is ___________ (a)m/s (b)L/T (c)m/s² (d)V
9. ___________ is an instrument used in measuring time per hour? (a)ticker tape timer (b)stop watch (c)sand clock (d)heartbeat
10. What is the earth pull of a body? (a)gravity (b)force (c)weight (d)mass
11. The S.I unit of work done is __________(a)Newton (b)Newton per metre (c)Newton X metre (d)metre square
12. When an object is said to be involved in a to and fro movement/motion, the object is in (a)relative motion (b) random motion (c) rotational motion (d)none of the above
13. What will be the speed of a car which covers a distance of 30 metres within 15 seconds? (a)2m (b)2m/s (c)2 seconds (d)450 m/s
14. One of the following is not used for measuring distance? (a)metre rule (b)vernier caliper (c)simple pendulum (d)micro metre screw gauge
15. Friction can be reduced by the following ways except (a)banking (b)lubricating (c)ball bearing (d)applying dry sand
16. The unit of force is _________ (a)Newton (b)Newton metre (c)Newton second (d)metre
17. Which of the following is not a derived quantity? (a)area (b)mass (c)moment (d)pressure
18. __________ is the distance travelled with time (A)distance (b)displacement (c)speed (d)velocity
19. _________ is the rate of velocity with respect to time (a)displacement (b)acceleration (c)distance (d)speed
20. Energy is measured in ___________ (a)Newton (b)Joules (c)metre (d)kilogram
21. Which of the following is not a form of energy? (a)sand energy (b)kinetic energy (c)solar energy (d)work energy
22. Viscosity is a _________ (a)scalar quantity (b)vector quantity (c)physical quantity (d)all of the above
23. Which of the following is not a low viscous liquid? (a)grease (b)water (c)kerosene (d)petrol
24. __________ force can also be called push (a)like force (b)unlike force (c)frictional force (d)pull
25. Which of the following is not a type of motion? (a)random motion (b)relative motion (c)resting motion (d)rotational motion
26. A car starts from rest and achieve a velocity of 20m/s in 10 seconds, moving westward from a starting point 0. What will be its average acceleration? (a)- 2m/s² (b) 2m/s² (c) 2m/s (d)- 2m/s
27. A decrease in velocity is called (a)acceleration (b)deceleration (c)velocity (d)brakes being applied
28. __________ is the ability of capability to do work? (a)energy (b)work done (c)power (d)food
29. The rate of work done or energy expended is known as __________ (a)energy (b)power (c)work done (d)distance
30. Power is measured in __________ (a)joules (b)Newton (c)watt (d)kilogram
31. The following are the factors that affect friction except (a)velocity (b)nature of contact surfaces (c)surface area in contact (d)weight
32. One metre is equivalent to ___________ (a)10 decimetre (b)100 centimetre (c)1000 millimetre (d)10000 micrometres
33. The S.I unit of speed is ___________ (a)m/s (b)cm/s (c)km/h (d)ft/s
34. The distance between two objects is 20m and the displacement is 5m, find the distance? (a)- 15m (b)15m (c)10m (d)5m
35. The formula for speed is ___________ (a)speed = distance/time (b)speed = displacement/time (c)distance = speed X time (d)displacement = speed + time
36. Which of the following is not a vector quantity? (a)weight (b)velocity (c)time (d)acceleration
37. The ___________ of an object is the rate of change of its velocity with respect to time. (a)distance (b)displacement (c)speed (d)acceleration
38. Which one of the following is not a unit of speed? (a)m/s (b)km/h (c)cm/s (d)ft/s
39. If an object is moving in a circular path, then it is undergoing ___________ motion. (a)rotational (b)rectilinear (c)periodic (d)random
40. The ratio of the centripetal force to the product of the mass and square of velocity is equal to ___________ (a)one (b)zero (c)centripetal acceleration (d)tangential acceleration
41. The force that opposes the relative motion of two surfaces in contact is called __________ force. (a)frictional (b)gravitational (c)centripetal (d)normal
42. The force that acts at a distance and does not require contact between the two objects is called __________ force. (a)frictional (b)contact (c)non-contact (d)gravitational
43. Which of the following is not a unit of time? (a)second (b)minute (c)hour (d)day
44. The ___________ of an object is the product of its mass and velocity. (a)density (b)pressure (c)momentum (d)acceleration
45. The force that causes a change in the shape or size of an object is called __________ force. (a)compressive (b)tensile (c)shearing (d)all of the above
46. The force that causes an object to move in a circular path is called ___________ force. (a)centripetal (b)tangential (c)normal (d)frictional
47. The ___________ of an object is the force required to change its velocity by one metre per second. (a)mass (b)weight (c)density (d)momentum
48. The force that opposes the motion of an object is called ___________ force. (a)drag (b)frictional (c)gravitational (d)normal
49. The force that always acts in the direction opposite to the motion of an object is called __________ force. (a)drag (b)frictional (c)normal (d)tangential
50. The ___________ of an object is the force required to change its velocity by one metre per second. (a)mass (b)weight (c)density (d)momentum

THEORY

Instruction: Answer three questions only

1. Write three examples each of fundamental and derived quantities
2. Write the dimensions and units of the quantities listed above
   Draw a velocity time graph showing when a vehicle is:
   At rest
   Moving in constant speed
   Constant acceleration
   Constant deceleration
3. A motor car accelerates for 10 seconds to attain a velocity of 20m/s. it continues with uniform velocity for a further 20 seconds and then decelerates so that it stops in 20 seconds. Draw the velocity time graph representation and calculate:
   • Acceleration
   • Deceleration
4. (a). Define motion and friction
   • (b). List the two types of force and explain one
   • (c). List four types of motion and explain

5. Define the following:

(a). Speed
(b). Velocity
(c). Position
(d). Displacement
(e). Distance