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MOTION IN ONE DIMENSION IIT JEE QUESTIONS
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11. A car moving with a speed of 40 km/h can be stopped by applying brakes after atleast 2 m. If the same car is moving with a speed of 80 km/h, what is the minimum stopping distance?
(a) 4 m (b) 6 m (c) 8 m (d) 2 m
Answer: C
12. A car accelerates from rest at a constant rate α for some time after which it decelerates at a constant rate β and comes to rest. If total time elapsed is t, then maximum velocity acquired by car will be
13. A body starts from rest, what is the ratio of the distance travelled by the body during the 4th and 3rd second?
14. What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
(a) 4 : 5
(b) 7 : 9
(c) 16 : 25
(d) 1 : 1
Answer: B
15. A car is moving along a straight road with a uniform acceleration. It passes through two points P and Q separated by a distance with velocity 30 km/h and 40 km/h respectively. The velocity of the car midway between P and Q is
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19. A body dropped from a height h with initial velocity zero, strikes the ground with a velocity 3 m/s. Another body of same mass dropped from the same height h with an initial velocity of 4 m/s. The final velocity of second mass, with which it strikes the ground is
(a) 5 m/s
(b) 12 m/s
(c) 3 m/s
(d) 4 m/s.
Answer: A
20. The water drop falls at regular intervals from a tap 5 m above the ground. The third drop is leaving the tap at instant the first drop touches the ground. How far above the ground is the second drop at that instant?
(a) 3.75 m
(b) 4.00 m
(c) 1.25 m
(d) 2.50 m.
Answer: A
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