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Physics Questions - Engineering Entrance

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Question	Category
Two intersecting straight lines move parallel to themselves with a speed of 3m/s and 4m/s respectively. The speed of point of intersection of lines, if the angle between them is 90 degree will be :	Physics
A cat want to catch a rat. The cat follows the path whose equation is x + y = 0. But the rat follows the path whose equation is X2 + y2	Physics
The relation between time t and distance x is t =ax2 where a and b are constants. The acceleration is :	Physics
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, the stopping distance will be :	Physics
A ball is released from the top of a tower of height h metre. If it takes T seconds to reach the ground. What is the position of the ball in T/3 seconds :	Physics
A car moving with a speed of 50 km/h can be stopped by brakes after at least 6 m . If the same car is moving at a speed of 100 km/h, the minimum stopping distance is :	Physics
Speeds of two identical cars are u and 4u. at a specific instant. The ratio of respective distances at which the two cars are stopped from that instant is :	Physics
If a body loses half of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest ?	Physics
Six persons are initially at six corners of a hexagon of side a. Each person now moves with a uniform speed v in such a manner that 1 is always directed towards 2, 2 towards 3, 3 towards 4 and so on. The time after which they meet is :	Physics
A bus starts moving with acceleration 2 m/s2 A cyclist 96 m behind the bus starts simultaneously towards the bus at 20 m/s. After what time will he be able to overtake the bus.	Physics
A body starts from origin and moves along x axis such that at any instant velocity is Vt = 2t3- 2t where t is in second and Vt is m/s. The acceleration of the particle where it it 2m from the origin is :	Physics
A,B,C and D are the points in a vertical line such that AB=BC=CD. If a body falls from rest at A, then the times of descend through AB, BC and CD are in the ratio :	Physics
A particle projected vertically upwards attains a maximum height H. If the ratio of the times to attain the height h (h	Physics
A river is flowing from west to east with a speed 15 m/s. A boy on south bank of the river, capable of swimming at 30 m/s in still waters, wants to swim, cross the river in the shortest time. He should swim in which direction ?	Physics
Kinetic energy of a body in motion equals the product of half its mass and the square of its _______	Physics
When a current is supplied by a battery, _______ energy is converted to electrical energy.	Physics
A mass of 4 kg is raised through a vertical distance of 10 m. If the gravitational acceleration is 9.8 m s-2, then the potential energy gained by the mass is	Physics
A car accelerates from rest at constant rate for t seconds and covers a distance x. The distance moved by it in the next t seconds will be :	Physics
A car starts from station and moves along the horizontal road by a machine delivering constant power. The distance traveled by car in time t is proportional to :	Physics
Two different masses m and 2m are fallen from height H1 and H2 respectively. First mass takes t seconds to and another takes 2t seconds to , then the ratio of H1 and H2 is	Physics
A stone is thrown vertically upwards in the air, the time of upward motion is t1 and the time of downward motion is t2. When air resistance is taken into consideration then :	Physics
A dust packet is dropped from the 9 th storey of a multi- storeyed building. In the first second of its free fall another dust packet is dropped from the 7 th storey 15 m below the 15 th storey. If both packets reac the ground at the same time, the height of the building is :	Physics
A stone is released from the top of a tower. The total distance covered by it in the last second of its motion equals distance covered by it in the first 3 s of motion. The stone remains in the air for :	Physics
A parachutist jumps from an aeroplane moving with a velocity of u. Parachute opens and accelerates downwards with a velocity 4 m/s. How long is the parachute remained in the air ?	Physics
a stone is released from a hydrogen balloon, going upwards with a velocity 12 m/s. When it is at a height of 65 m from the ground, the time taken by the stone to reach the ground is :	Physics
A stone is thrown vertically upwards from a cliff with velocity 5 m/s. It strikes the pond near the base of cliff after 4 s. The height of cliff is :	Physics
The velocity of a particle at an instant is 10 m/s. After 3 s its velocity becomes 16 m/s. The velocity at 2 s before the given instance will be :	Physics
A particle moves 200 cm in the first 2 s and 220 cm in the next 4 s with uniform deceleration. The velocity of the particle at the end of 7 s will be :	Physics
A train starts from a station with an acceleration of 1 m/s^2. A boy is 48 m behind the train with constant velocity 10 m/s, the minimum time after which the boy will catch the train is:	Physics
A particle starts from rest with constant acceleration for 20 s. If it travels distance y1 in the first 10 s and a distance y2 in the next 10 s then:	Physics
A beaker containing water is balanced on a pan of a common balance. A solid of specific gravity one and mass 5g is tied on the arm of the balance and immersed in water contained in the beaker. the scale pan with the beaker	Physics
A car starts from rest requires a velocity v with uniform acceleration 2 m/s2 then it comes to stop with uniform retardation 4 m/s2. If total time for which it remains in motion is 3 s the distance traveled is :	Physics
A body is acted upon by a constant force. What is the nature of displacement-time graph?	Physics
A body starts from rest, with uniform acceleration a. The acceleration of a body as function of time t is given by the equation a=pt where p is constant, then the displacement of the particle in the time interval t=0 to t= t1 will be	Physics
A point particle starting from rest has a velocity that increases linearly with time such that v= pt . where p= 4 m/s^2 . The distance covered in the first 2 seconds will be :	Physics
The two ends of a train moving with uniform acceleration pass a certain point with velocities u and v. The velocity with which the middle point of train passes the same point is:	Physics
Two identical spherical masses are kept at some distance as shown. Potential when a mass m is taken from surface of one sphere to the other.	Physics
Six particles each of mass m are placed at the corners of a regular hexagon of edge length a. If a point m0 is placed at the centre of the hexagon, then the net gravitational force on the point mass m0 is :	Physics
How the gravitational constant will change if a brass plate is introduced between two bodies ?	Physics
If the distance between the two particles is increased by 2 %, then the force of attraction between them will :	Physics
The time period of an earths satellite in circular orbit is independent of :	Physics
The time period of a satellite of earth is 5 h. If the separation between the earth and satellite is increased to 4 times the previous value, the new time period will become:	Physics
The kinetic energy needed to project a body of mass m surface to infinity is :	Physics
If suddenly the gravitational force of attraction between earth and a satellite revolving around it becomes zero then the satellite will :	Physics
The ratio of energy required to raise a satellite up to a height R(radius of earth)from the surface of earth to that required to put it into orbit there is :	Physics
An electron moves in a circular orbit at a distance from a proton with kinetic energy E. To escape to infinity, the energy which must be supplied to the electron is :	Physics
The angular momentum (L) of earth revolving round the sun is proportional to r^n , where r is the radius of earth. The value of n is:	Physics
A satellite of mass m moves along an elliptical path around the earth. The areal velocity of the satellite is proportional to :	Physics
Rate of change of weight near the earths surface varies with height(h) as :	Physics
The ratio of acceleration due to gravity at a depth h below the surface of earth and at a height h above the surface for h<< radius of earth	Physics

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