Techno India Group Public School

1. A train starting from rest attains a velocity of 72 kmph in 5 minutes; the distance travelled by the train during the time, in kilometers

(A) 6
(B) 4
(C) 2
(D) 1

2. The mass of an object on the surface of earth is 6 kg, its mass on the surface of moon ( g_earth = 6 g_moon)

(A) 1 kg
(B) 3 kg
(C) 9 kg
(D) 6 kg

3. Pressure can be expressed with following unit(s)

(A) pascal
(B) torr
(C) bar
(D) mmHg

4. The relative density of an object is D. The object floats for

(A) D < 1
(B) D = 1
(C) D > 1
(D) None of the above

5. The work done by a mechanical agent is zero for

(A) applied force ≠ 0, displacement = 0
(B) applied force ≠ 0, displacement ≠0, force and displacement are mutually perpendicular
(C) applied force = 0, displacement ≠ 0
(D) force and displacement are acting in opposite directions

6. A speed-time graph is shown for a moving car. The ratio of distance travelled by the car during first three seconds to the total distance travelled in seven seconds

(A) 3 : 1
(B) 1 : 3
(C) 2 : 3
(D)2 : 5

7. The pressure of a liquid at a depth does not depend on

(A) the depth of the liquid
(B) the place
(C) the density
(D) the quantity

8. A ship sends out ultrasound that returns from the seabed and is detected once again after 3 s. If the speed of ultrasound through seawater is 1530 ms^-1, the depth of seabed there is

(A) 2500 m
(B) 2295 m
(C) 3060 m
(D) 3200 m

9. On which factor speed of sound through gas does not depend?

(A) temperature
(B) density
(C) humidity
(D) pressure

10. The speed of yellow light ( 600 nm ) is 3 x 10⁸ ms^-1. Its frequency is

(A) 4 x 10¹⁴ Hz
(B) 5 x 10¹⁴ Hz
(C) 6 x 10¹⁴ Hz
(D)2 x 10¹⁴ Hz

11. The velocity of the ball of mass m at the base, released at the highest point on a smooth inclined plane( 30⁰ ) at a height h from the horizontal ground, is

12. 1 kg-wt force =

(A) 981 N
(B) 9.81 N
(C) 981 dynes
(D) None of the above

13. The velocity (v) and acceleration (a) of an object at the highest point( of height H ), when thrown vertically upward from ground

(A) v = 0, a = 0
(B) logo

(C) v = 0, a = g
(D) v = 0, a = - g

14. Two objects of masses M and m ( M> m ) have same momentum. Their respective kinetic energies are K and k.

(A) K > k
(B)K < k
(C) K = k
(D) Cannot be determined

15. Match the laws/principleof nature and relevant formula, given in two columns:

RULE		PHENOMENON
A	Laws of motion	P	Apparent loss of weight of a body in a fluid is the weight of the displaced volume of the fluid
B	Law of Gravitation	Q	F= ma
C	Archimedes’ Principle	R	KE + PE = constant
D	Principle of Conservation of Energy	S	p = mv
		T	F = =G ((m₁ m₂)/ r²)

(A) A – Q, B – T, C – P, D – R
(B) A – T, B – S, C – R, D – Q
(C) A – Q, B – P, C – T, D – S
(D) A – P, B – Q, C – T, D – S