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Class XI

PHYSICS

Ch- Motion in a Straight Line (1DMotion)

WORKSHEET-3

1. b
Two particles A and B get 4 m closer each second while traveling in opposite
direction. They get 0.4 m closer every second while traveling in same direction.
The speeds of A and B are respectively

a. 2.2 m/s and 0.4 m/s.
b. 2.2 m/s and 1.8 m/s.

c. 4 m/s and 0.4 m/s.

d. 5 m/s and 0.8 m/s.

2. b
A train of length 200 m traveling at 30 m/sec overtakes another train of length
300 m traveling at 20 m/sec. The time taken by the first train to pass the second is

a. 60 seconds.

b. 50 seconds.
c. 40 seconds.

d. 30 seconds.

3. c
A 150 m long train is moving with a uniform velocity of 45 km/hr. The time taken
by the train to cross a bridge of length 850 meters is

a. 52 s.

b. 68 s.

c. 80 s.

d. 92 s.

4. A bullet emerges from a barrel of length 1. 5 m with a speed of 600 ms . Assuming a
-1
constant acceleration, the approximate time that it spends in the barrel after the gun is
fired is

a. 5ms

b. 50ms

c. 500ms
d. 5 s

5. a
An object is projected upward with a velocity of 80 ms . The time after which it
-1
will strike the ground is (g= 10 m/s )
2