Q. No.1. \(\sqrt{120}~\text{s} \)
2. \(15~\text{s}\)
3. \(10\sqrt2~\text{s} \)
4. \(\sqrt{110}~\text{s} \)
1. \(30~\text s\)
2. \(40~\text s\)
3. \(50~\text s\)
4. \(60~\text s\)
A train 100 m long traveling at 40 m s-1 starts overtaking another train 200 m long traveling at 30 m s-1. The time taken by the first train to pass the second train completely is
1. 30 s
2. 40 s
3. 50 s
4. 60 s
Two cars and start from a point at the same time in a straight line and their positions are represented by and At what time do the cars have the same velocity ?
1.
2.
3.
4.
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 , and train B moves south with a speed of 90 . The magnitude of the velocity of B with respect to A is:
1. 40
2. 0
3. 25
4. 15
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A thief is running away on a straight road in a jeep moving with a speed of 9 m s-1. A policeman chases him on a motor cycle moving at a speed of 10 m s-1. If the instantaneous separation of the jeep from the motor cycle is 100 m, how long will it take for the policeman to catch the thief?
1. 1 s
2. 19 s
3. 90 s
4. 100 s
1. \(\Delta t+3\)
2. \(3 \Delta t\)
3. \(\frac{\Delta t}{3}\)
4. \(\Delta t - 3\)
They meet for the first time:
1. at \(B\)
2. at \(C\)
3. between \(A\) & \(B\)
4. between \(B\) & \(C\)
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1. \(\left(t_1+t_2\right) / 2 \)
2. \(t_1 t_2 /\left(t_2-t_1\right) \)
3. \(t_1 t_2 /\left(t_2+t_1\right) \)
4. \(t_1-t_2\)
2. \(40\) ms-1
3. \(25\) ms-1
4. \(10\) ms-1
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