NAT I Engineering Physics With Answers

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NAT I Engineering Physics

Sr. # Questions Answers Choice
1 Two bodies of masses m1 and m2 have equal momentum their kinetic energies E1 and E2 are in the ratio √m<sub>1</sub> :&nbsp;√m<sub>2</sub> <span style="font-size: 14.44444465637207px;">m</span><sub>1 </sub>:&nbsp;<span style="font-size: 14.44444465637207px;">m</span><sub>2</sub> <span style="font-size: 14.44444465637207px;">m</span><sub>2 </sub>:&nbsp;<span style="font-size: 14.44444465637207px;">m</span><sub>1</sub> <span style="font-size: 14.44444465637207px;">m</span><sub>1</sub><sup>2</sup>&nbsp;:&nbsp;<span style="font-size: 14.44444465637207px;">m</span><sub>2</sub><sup>2</sup>
2 A body of mass 2 kg is thrown up vertically with K.E of 490 joules If the acceleration due to gravity is 9.8 m/s2 the height at which the K.E of the body becomes half its original value is give by: 50 m 12.5 m 25 m 10 m
3 A body moves a distance of 10 m along a straight line under the action of a force of 5 Newtons, if the work done is 25 joules the angle which the force takes with the direction of motion of the body is: 0° 30° 60° 90°
4 Two masses of 1 g and 4 g are moving with equal kinetic energies The ratio of the magnitudes of their linear moments is: 4 : 1 √2 : 1 1 : 2 1 : 16
5 Which of the following four statements is false? A body can have zero velocity and still be accelerated A body can have a constant velocity and still have a varying speed A body can have a constant speed and still have a varying velocity The direction of the velocity of a acceleration is constant
6 The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s2. The distance covered by the body in the 5th second of its motion is 25 m 35 m 50 m 85 m
7 The acceleration 'a' in m/s2 of a particle is given by a = 3 t2 + 2 t + 2,where 't' is the time if the particle starts out with a velocity v = 2 m/s at t = 0, then the velocity at the end of 2 second is 12 m/s 24 m/s 18 m/s 36 m/s
8 A body is dropped from a tower with zero velocity reaches ground in 4s. The height of the tower is about 80 m 20 m 160 m 40 m
9 What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey? 4 : 5 7 : 9 16 : 25 1 : 1
10 A train of 150 m length is going towards north direction at a speed of 10 ms-1 A parrot flies at a speed of 5 ms-1 towards south direction parallel to the railway track,The time taken by the parrot to cross the train is equal to 12 s 8 s 15 s 10 s
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