Test Preparation on Motion in One Dimension-II- Physics Test Series For NEET 2020
A police jeep is chasing with velocity of 45 km/h a thief in
another jeep moving with velocity 153 km/h. Police fires a
bullet with muzzle velocity of 180 m/s. The velocity with
which it will strike the car of the thief is
(a) Effective speed of the bullet
= speed of bullet + speed of police jeep
= 180 m/ s + 45 km/ h = (180 + 12.5)m/ s = 192.5 m/ s
Speed of thief ’s jeep = 153km/ h = 42.5m/ s
Velocity of bullet w.r.t thief ’s car = 192.5 - 42.5 =150m/s
A boat is sent across a river with a velocity of 8 km/hr. If the
resultant velocity of boat is 10 km/hr, then velocity of the
river is
A train is moving towards east and a car is along north, both
with same speed. The observed direction of car to the
passenger in the train is
Two trains are moving with equal speed in opposite directions
along two parallel railway tracks. If the wind is blowing with
speed u along the track so that the relative velocities of the
trains with respect to the wind are in the ratio 1 : 2, then the
speed of each train must be
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