A 150 m long train is moving to north at a speed of 10 m/s. A parrot flying towards south with a speed of 5 m/s crosses the train. The time taken by the parrot the cross to train would be: 

(1) 30 s

(2) 15 s

(3) 8 s

(4) 10 s

Subtopic:  Relative Motion in One Dimension |
 82%
From NCERT
PMT - 1992
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A moves with 65 km/h while B is coming back of A with 80 km/h. The relative velocity of B with respect to A is 

1. 80 km/h

2. 60 km/h

3. 15 km/h

4.145 km/h

Subtopic:  Relative Motion in One Dimension |
From NCERT
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Two trains along the same straight rails moving with constant speed 60 km/hr and 30 km/hr respectively towards each other. If at time t = 0, the distance between them is 90 km, the time when they collide is:

1. 1 hr

2. 2 hr

3. 3 hr

4. 4 hr

Subtopic:  Relative Motion in One Dimension |
 79%
From NCERT
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A bus is moving with a velocity 10 m/s on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what velocity should the scooterist chase the bus

(1) 50 m/s

(2) 40 m/s

(3) 30 m/s

(4) 20 m/s

Subtopic:  Relative Motion in One Dimension |
 86%
From NCERT
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An automobile travelling with a speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e. 120 km/h, the stopping distance will be 

(1) 20 m

(2) 40 m

(3) 60 m

(4) 80 m

Subtopic:  Uniformly Accelerated Motion |
 79%
From NCERT
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A lift is going up. The total mass of the lift and the passenger is 1500 kg. The variation in the speed of the lift is as given in the graph. The height to which the lift takes the passenger is

(1) 3.6 meters

(2) 8 meters

(3) 1.8 meters

(4) 36 meters

Subtopic:  Uniformly Accelerated Motion |
 64%
From NCERT
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Two cars are moving in the same direction with the same speed 30 km/hr. They are separated by a distance of 5 km. The speed of a car moving in the opposite direction, if it meets these two cars at an interval of 4 minutes, will be

1. 40 km/hr

2. 45 km/hr

3. 30 km/hr

4. 15 km/hr

Subtopic:  Relative Motion in One Dimension |
 73%
From NCERT
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An iron ball and a wooden ball of the same radius are released from a height ‘h’ in a vacuum. The time taken by both of them to reach the ground is

(1)  Unequal                       

(2)  Exactly equal

(3)  Roughly equal               

(4)  Zero

Subtopic:  Uniformly Accelerated Motion |
 79%
From NCERT
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Two cars P and Q start from a point at the same time in a straight line and their positions are represented by xpt=at+bt2 and xQ(t)=ft-t2. At what time do the cars have the same velocity?

(1) a-f1+b

(2)a+f2b-1

(3) a+f21+b

(4) f-a21+b

Subtopic:  Instantaneous Speed & Instantaneous Velocity |
 75%
From NCERT
NEET - 2016
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If the velocity of a particle is v=At+Bt2, where A and B are constants, then the distance travelled by it between 1s and 2s is?

1. 3A+7B
2. 3A2+7B3
3. A2+B3
4. A3+B2

Subtopic:  Distance & Displacement |
 82%
From NCERT
NEET - 2016
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