# CBSE Class XI Guess Paper of Physics : 2011

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## Guess Paper - 2011

CBSE Class XI

(Physics)

## (MOTION)

**Q. 1.When the passenger moving in a bus, the road side trees appear to be
moving ------------------------------- (a) Back ward (b )Forward**

**Q. 2.In uniform motion the object covers ------------ (a) equal distance
(b) unequal distance**

**Q. 3.Where objects cover unequal distances in equal interval of time then
the motion is called ---------------- (a) uniform motion (b) non uniform motion**

**Q. 4.v = (a) t/s (b) s/t**

**Q. 6.An object travels 16m in 4sec and another 16 m in 2 sec. what is the
average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34ms-1**

**Q. 7.If we specify, its direction of motion along with its speed, the
quantity that specifies with the aspects is called------------- (a) velocity (b)
motion**

**Q. 8.The velocity of an object can be -------------- (a) non uniform or
variable (b) uniform or variable**

**Q. 9.A car accelerate uniformly from 18 km h-1to 36 km h-1in 5 sec.
calculate the acceleration------------- (a) 1ms-2(b) 1 ms-3**

**Q. 10.A train starting from rest attains a velocity of 72 km h-1in 5
minutes. Assuming that the acceleration is uniform. Find the distance traveled
by the train for attaining this velocity --------------------------------- (a)
2km (b) 5km**

**Q. 2: A car goes from a town A to another town B with a speed of 40 km/h
and returns back to the town A with a speed of 60 km/h. The average speed of the
car during the complete journey is -
**(a) 48 km/h

(b) 50 km/h

(c) zero

**Q.6: A ball is thrown vertically upwards. It rises to a height of 50 m and
comes back to the thrower,
**(a) the total distance covered by the ball is zero.

(b) the net displacement of the ball is zero.

(c) the displacement is 100 m.

**Q.7: In 12 minutes a car whose speed is 35 km/h travels a distance of
**(a) 7 km

(b) 3.5 km

(c) 14 km

(d) 28 km

**Q.8: When a graph of one quantity versus another results in a straight
line, the quantities are -**

(a) both constant

(b) equal

(c) directly proportional

(d) inversely proportional

**Q.9: A body moving along a straight line at 20 m/s undergoes
an acceleration of -4 m/s2. After two seconds its speed will be -**

(a) -8 m/s

(b) 12 m/s

(c) 16 m/s

(d) 28 m/s.

**Q.10: A car increases its speed from 20 km/h to 30 km/h in 10 seconds.
Its acceleration is**

(a) 30 m/s2

(b) 3 m/s2

(c) 18 m/s2

(d) 0.83 m/s2

**Q.11: A body whose speed is constant**

(a) must be accelerated

(b) might be accelerated

(c) has a constant velocity

(d) can not be accelerated.

**Q.12: When the distance that an object travels is directly proportional to
the length of time it is said to travel with**

(a) zero velocity

(b) constant speed

(c) constant acceleration

(d) uniform velocity

**Q.13: a particle moves with uniform positive acceleration. Its
velocity-time graph will be**

(a) a straight line parallel to the time axis

(b) a straight line inclined at an obtuse angle to the time axis

(c) a straight line inclined at an acute angle to the time axis

(d) none of these.

**Q.15: A particle experiences constant acceleration for 20 seconds after
starting from rest. If it travels a distance s1in the first 10 seconds and
distance s2in the next 10 seconds then,**

(a) s2= s1

(b) s2= 2s1

(c)s2= 3s1

(d) s2= 4s1

**Q.16: In which of the following cases the object does not possess
an acceleration or retardation when it moves in**

(a) upward direction with decreasing speed

(b) downward direction with increasing speed

(c) with constant speed along circular path

(d) with constant speed along horizontal path

**Q.17: A person travels distance πR along the circumference of a circle of
radius R. Displacement of the person is**

(a) R

(b) 2R

(c) 2πR

(d) zero

**Q.18: The velocity of an object is directly proportional to the time
elapsed. The object has**

(a) uniform speed

(b) uniform velocity

(c) uniform acceleration

(d) variable acceleration

## Answer

**1 - d. 2 - a. 3 - b. 4 - c. 5 - d. 6 - b. 7 - a. 8 - c. 9 - b. 10 - d. 11 - b. 12 - b 13 - c. 14 - c. 15 - c. 16 - d. 17 - b. 18 - c.**