NEET Physics Ralative Motion in One Dimension MCQs Set 01

Question:  Two trains, each 40 m long are travelling in opposite direction with equal velocity 20 m/s. The time of crossing is

a) 1s

b) 2s

c) 3s

d) Zero

Answer: 1s

Question:  Two cars A and B approach each other at the same speed, then what will be the velocity of A if velocity of B is 8 m/s?

a) – 8 m/s

b) 16 m/s

c) 8 m/s

d) Can’t be determined.

Answer: – 8 m/s

Question: A train of 150 m length is going towards north direction at a speed of 10 ms^–1. A parrot flies at a speed of 5 ms^–1 towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

a) 10 s

b) 15 s

c) 8 s

d) 12 s

Answer: 10 s

Question: A boat takes 2 hours to travel 8 km and back in still water lake. With water velocity of 4 km h^–1, the time taken for going upstream of 8 km and coming back is

a) 160 minutes

b) 100 minutes

c) 80 minutes

d) 120 minutes

Answer: 160 minutes

Question: A car is moving on a road and rain is falling vertically. Select the correct answer.

a) The rain will strike the front screen only

b) The rain will strike both the screens

c) The rain will not strike any of the screens

d) The rain will strike the back screen only

Answer:  The rain will strike the front screen only

Question:  If a boat can travel with a speed of v in still water, which of the following trips will take the least amount of time ?

a) travelling a distance of 2d in still water

b) travelling a distance of 2d across (perpendicular to) the current in a stream

c) travelling a distance d downstream and returning a distance d upstream

d) travelling a distance d upstream and returning a distance d downstream

Answer:  travelling a distance of 2d in still water

Question:  Two trains are each 50 m long moving parallel towards each other at speeds 10 m/s and 15 m/s respectively. After what time will they pass each other?

a) 4 sec

b) 2 sec

c) 6 sec

d) 9 sec

Answer: 4 sec

Question:  A bus is moving with a velocity of 10 ms^–1 on a straight road. A scootorist wishes to overtake the bus in one minute. If the bus is at a distance of 1.2 km ahead, then the velocity with which he has to chase the bus is

a) 30 ms^–1

b) 60 ms^–1

c) 40 ms^–1

d) 10 ms^–1

Answer: 30 ms^–1