Speed and Velocity, Work Power and Energy

1. What is the formula for speed?
A   :   Distance covered/Time
B   :   Change in velocity/Time
C   :   Distance in definite direction /Time
D   :   Change in momentum/Time

2. What is the unit of speed?
A   :   Metre/second
B   :   Metre/second²
C   :   Metre/minute
D   :   Metre/hour

3. What is the formula for velocity?
A   :   Distance covered/Time
B   :   Displacement/Time
C   :   Change in velocity/Time
D   :   Change of momentum/Time

4. What is the unit for velocity?
A   :   Metre/second
B   :   Metre/second²
C   :   Metre/minute
D   :   Metre/hour

5. What is called if a body posses only magnitude or size alone?
A   :   Speed
B   :   Velocity
C   :   Vector quantity
D   :   Scalar quantity

6. What is called if a body posses both magnitude and direction of velocity?
A   :   Speed
B   :   Velocity
C   :   Vector quantity
D   :   Scalar quantity

7. What is the rate of change of displacement of a body?
A   :   Body at rest
B   :   Body at motion
C   :   Speed
D   :   Velocity

8. What is called if a body does not change its position with respect to its surroundings?
A   :   Body at motion
B   :   Body at rest
C   :   Speed
D   :   Velocity

9. What is called if a body changes its position with respect to its surroundings?
A   :   Body at rest
B   :   Body at motion
C   :   Speed
D   :   Velocity

10. What is velocity of a body travels a distance of 168 metres in a line in 21 seconds?
A   :   6 m/sec
B   :   8 m/sec
C   :   10 m/sec
D   :   12 m/sec

11. What is the speed of a train of 80 metre long train passes a railway station platform of 120 metres length in 20 seconds?
A   :   30 km/hour
B   :   32 km/hour
C   :   34 km/hour
D   :   36 km/hour

12. What is the formula for acceleration?
A  :  $\displaystyle \frac{P}{t}$
B  :   $\displaystyle \frac{s}{t}$
C  :  $\displaystyle \frac{v-u}{t}$     
D  :  $\displaystyle \frac{m(v-u)}{t}$

13. What is the unit of acceleration of an object?
A   :   Metre/second
B   :   Metre/second²
C   :   Metre/minutes
D   :   Metre/minutes²

14. What is the acceleration of a car if the speed of the car has increased from 25 km per hour to 40 km per hour in one minute?
A   :   0.059 m/sec²
B   :   0.59 m/sec²
C   :   0.069 m/sec²
D   :   0.69 m/sec²

15. What is the retardation of a car moving with a velocity of 50 km/hr is brought to rest in 45 seconds?
A   :   0.40 m/sec²
B   :   0.30 m/sec²
C   :   0.20 m/sec²
D   :   0.10 m/sec²

16. What is the acceleration of an aeroplane taking off from landing field has to run 700 metres if it leaves the ground in 10 seconds from the start?
A   :   8 metre/sec²
B   :   10 metre/sec²
C   :   12 metre/sec²
D   :   14 metre/sec²

17. What maximum height a stone will reach if it is thrown upwards with a velocity of 20m/sec?(g = 10m/sec²)
A   :   10 m
B   :   20 m
C   :   30 m
D   :   40 m

 18. What is the work done in unit time?
A   :   Energy
B   :   Power
C   :   Force
D   :   Acceleration

19. What is the capacity of a body to do work is called?
A   :   Energy
B   :   Power
C   :   Acceleration
D   :   Force

20. What is the ratio of power output to power input?
A   :   Work
B   :   Energy
C   :   Efficiency
D   :   Acceleration

21. What is called if a force of 1Newton acts on a body and moves it through a distance of 1 metre?
A   :   1 Joule
B   :   10 Joules
C   :   1 dyne
D   :   10 dynes

22. How many ergs for 1 Joule?
A   :   $\displaystyle 10^{3}$ ergs
B   :   $\displaystyle 10^{5}$ ergs
C   :   $\displaystyle 10^{7}$ ergs
D   :   $\displaystyle 10^{9}$ ergs

23. How many newtons for 1 kilogram?
A   :   981 Newtons
B   :   98.1 Newtons
C   :   9.81 Newtons
D   :   0.981 Newtons

24. How many watts for 1 horse power in metric system?
A   :   725.5 watts
B   :   735.5 watts
C   :   745.5 watts
D   :   755.5 watts

25. How many watts for 1 horse power in British system?
A   :   726 watts
B   :   736 watts
C   :   746 watts
D   :   756 watts

26. What is the equivalent unit for 1horse power in metric system?
A   :   75 kg.m/sec
B   :   76 kg.m/sec
C   :   77 kg.m/sec
D   :   78 kg.m/sec

27. What is the formula for potential energy?
A   :   mgh joule
B   :   mgh² joule
C   :   1/2 mgh joule
D   :   2/3 mgh joule

28. What is the formula for kinetic energy?
A   :   1/2 mv joule
B   :   1/2 mv² joule
C   :   2/3 mv² joule
D   :   2/3 mv joule

29. How much work done in one hour, if a pump can raise 100 liters of water through a height of 200 meters in one minutes?
A   :   12 x $\displaystyle 10^{4}$ kg meter
B   :   12 x $\displaystyle 10^{5}$ kg meter
C   :   12 x $\displaystyle 10^{6}$ kg meter
D   :   12 x $\displaystyle 10^{7}$ kg meter

30. What is the work done, if a force of 250 newtons acted upon a body and the body has been moved through a distance of 15 metres?
A   :   3720 Joules
B   :   3730 Joules
C   :   3740 Joules
D   :   3750 Joules

31. What is the potential energy, if a body of mass 250 kg is at a height of 30 metre?
A   :   72.57 KJ
B   :   73.57 KJ
C   :   74.57 KJ
D   :   75.57 KJ

32. What is the potential energy in a body of mass 10 kg kept on the top of a pole 20 metres height?
A   :   1942 Joules
B   :   1952 Joules
C   :   1962 Joules
D   :   1972 Joules

33. What is the work done in joules if a load of 15.5 kg is lifted through a height of 4.4 metres?
A   :   639 Joules
B   :   649 Joules
C   :   659 Joules
D   :   669 Joules

34. What is the kinetic energy of a bullet of mass 5gm travels with a speed of 500 m/sec?
A   :   620 Joules
B   :   625 Joules
C   :   630 Joules
D   :   635 Joules