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Some examples from this set of practice questions
1.
In 1.0 s, a parcle goes from point A to point B, moving in a semicircle of radius 1.0 m (see figure). The magnitude of the average velocity is
Answer: Average velocity- total displacement/time =2m/1sec =2m/sec
2.
The maximum horizontal range of a projectile is 400 m. The maximum value of height gained by it will be
Answer: R=(u^2)/g =400m (as theta=45 degree) H= (u^2)/2g =400/2 =200m (as theta =90 degree)
3.
A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with vertical is
Answer: 45 degree
4.
A person, aiming to reach the exact opposite point on the other bank of a stream, is swimming with a speed of 0.5 m/s at an angle of 120 0 with the direction of the flow of water. The speed of water in the stream is:
Answer: = 0 .25 m/s
5.
A bus is moving with a velocity of 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
Answer: = 20 m/s
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