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