# 10 JAN NMDCAT SUNDAY TEST PART 1: PHYSICS

## INSTRUCTIONS:

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which of the following bodies have largest k.E

mass m speed 4v

mass 2m and speed 3v

mass 3M and speed 2v

2. the ratio of Work For two bodies is 4:5 and the ratio of time is 5:4 then the ratio of power is

4:5

1:1

16:25

25:16

3. a body travel displacement of 10 m by force 5N if 25J work is done then angle between F and d is

60°

30 °

45°

4. if the ratio of W1:W2 is 2:3 then the ratio of power at t-constant is

4:9

1:1

2:3

3:2

5. a moon of Jupiter has a nearly circular orbit of radius R and an orbit time period T. which of the following expression gives the mass of Jupiter.

2πR³/ (GT)²

2π²R/T

4π²R³/GT²

2πR/T

6. a boy hold a 20 N weight at arm length for 10sec. his arm is 1.5m height from ground. the work done by the force of the boy on the weight while holding it is

0J

40J

96J

20J

6. a boy hold a 20 N weight at arm length for 10sec. his arm is 1.5m height from ground. the work done by the force of the boy on the weight while holding it is

0J

40J

96J

20J

7. for different planets escape velocity is

depends on mass of body

constant

different

same

8. the escape velocity doesn’t depends on

density

angle

mass of object

Mass of planet

9. at constant g the ratio of radi will be in case of escape velocity

√R1:√R2

R1:R2

R2:R1

√R2:√R1

10. if a body of mass 2kg is raised vertically through 2 metre then the work done will be.

39.2

3.92

392.1

38.2

11. the percentage increase in the middle momentum of a body is 50% . what is the % increase in K.E

125%

10%

50%

300%

12. time taken by geostationary satellite to complete one rotation around earth

1 day

1 hour

84min

1 year

13. 10 second after the electric fan is turned on, the fan rotates at 300 rev/min its average angular acceleration is

500rev/sec2

30rev/sec2

14. two partical of equal masses are revolving in circular path of radius r1 and r2 respectively with the same speed. the ratio of their centripetal force is

(r2:r2)²

√r2:r1

r2:r1

none

15. one mega watt is equal to

3.6x 10⁶.10³

3.6 X10⁹

3.6x 10⁶

both a and c

16. the rotational kinetic energy of a hoop is

doubled and translational kinetic energy

equal to its translational kinetic energy

half thaan its translational kinetic energy

four times than its translational kinetic energy

17. a satellite moving around the earth constitutes

non inertial frame

neither inertial or non inertial

both inertial and non inertial

an inertial frame of reference

18. under the influence of a force, an object of mass 4kg accelerates from 3 metre per second to 6 metre per second how much work was done on an object during this period of time

54

27

72

95

19. a car of mass 100 kg first move forward by 25 metre per second and then 5 metre per second back world, what is the change in kinetic energy

250KJ

150kJ

350KJ

300KJ

20. I am a slide down an inclined plane and with the bottom with velocity v if the same were in term of a ring which rolls down, the linear velocity at the bottom would be

v

√2v

v/√2

2v

20.The escape velocity form the earth surface is about

(a) 4.2 km/s

(b) 7.5 km/s

(c) 9.5 km/s

(d) 11km/s

21. A boat moving at constant speed v through still water experiences a total frictional drag

F. What is the power developed by the boat

(a) 1/2Fv^2

(b)1/2Fv

(c) Fv2

(d) Fv

(22) When two protons are brought close, their

(a) Kinetic energy increases

(b) P.E. increases

(c) P.E. decreases

(d) P.E. doe not change

(23) “A horizontal force F pulls a 20 kg box at a constant speed along a horizontal floor. If the coefficient of friction between the box and the floor is 0.25, how much work is done by the force F in moving the box through a distance of 2m?

(a) 49 J

(b) 98 J

(c) 147 J

(d) 196 J

(24) Temperature of hot igneous rocks is about

(a) 20, 000;C or more

(b) 2000;C or more

(c) 200;C or more

(d) 20;C or more

(25) A ball is thrown vertically upwards. Neglecting air resistance, which statement is

(a) The kinetic energy of the ball is greatest at the greatest height attained

(b) The potential energy of the ball increase uniformly with time during the ascent. (c) By the principle of conservation of momentum, the momentum of the ball is constant throughout its motion

(d) By the principle of conservation of energy, the total energy of the ball is constant throughout its motion

(26) Propulsion force of a rocket is

(a) Non-conservative force

(b) Conservative force

(c) Conservative and rocket has reached high altitude (d) None of these