Laws of motion multiple choice questions NEET Physics
Physics Laws of Motion multiple choice questions in self practice tests. The answers and solutions are also given.
These multiple choice questions for NEET are based on 10 + 2 syllabus.
You must be study the lesson Laws of motion in NCERT textbook or other.
You should answer the questions in your own way. Each practice test contains ten questions only.
Some questions were given in previous years competitive examinations also.
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Physics NEET Laws of Motion multiple choice questions
Physics
Multiple choice questions
Self practice test 1
1) A block of mass m is placed on a smooth wedge of inclination theta. The whole system is accelerated horizontally so that the black does not slip on the wedge. The force exerted by the wedge on the block. (g is acceleration due to gravity) will be ;
2) 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at any angle of 30° with the wall it is reflected with the same speed and at the same angle if the ball is in contact with the wall for 0.25 seconds the average force acting on the wall is
1. 48 N
2.12 N
3. 96 N
4. 24 N
4) Three blocks with masses m, 2m, and 3m are connected by strings one after the other. After an upward force F is applied on black m, the masses move upward at constant speed v. What is the net force on the block of mass 2m ? ( g is the acceleration due gravity)
1. 6 mg
2. 2mg
3. 3 mg
4. Zero
5. A train has 10 wagons each of mass
6) Two blocks A and B of masses 3m and m respectively are connected by a massless and a extensible string. The whole system is suspended by a massless spring. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively ;
1. g, g
2. g/3, g
3. g, g/3
4. g/3, g/3
7. Force of 3 N acts on a system of two blocks of mass 2 kg and 1 kg. Contact force between the blocks is ;
1. 2N
2. 3N
3. 1N
4. 0
9) A particle moving with velocity V is acted by 3 forces by the vector triangle PQR,( Right angle at R) the velocity of the particle will be
1. Remain constant
2. Increase
3. Change according to the smallest force QR
4. Decrease
10) A man weights 80 kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m per square seconds. What would be the reading on the scale ? (g is equal to 10 metre per square seconds )
1. Zero
2. 1200 N
3. 800 N
4. 400 N
Answers to self practice test 1
1) 3
2) 4
3) 3
4) 4
5) 3
6) 2
7) 3
8) 3
9) 1
10) 2
Solutions to self practice test 1
Self practice test 2
1) Water jet is coming out of a hose pipe of diameter 20 cm with speed 20 cm/sec. It strikes a man inelastically. Find the force exerted by water jet on the person.
1. 5.04 N
2. 2.52 N
3. 9.4 N
4. 1.26 N
2) A balloon with mass ‘m’ is descending down with an acceleration ‘a’ (where a is greater than g). How much mass should be removed from it so that it starts moving up with an acceleration ‘a’ ?
1. ma / (g + a)
2. ma / (g – a)
3. 2ma / ( g + a)
4. 2ma / (g – a)
3) A person of mass 60 kg is inside a lift of mass 940 kg and a process the balloon and control panel then lift starts moving upwards with an acceleration 1.0 m/ S^2 if g equal to 10 m for square they tension in the supporting cable is
1. 9680 N
2. 8600 N
3. 1200 N
4. 11000 N
4) A man of mass 90 kg is standing in an elevator whose cable broke suddenly. If the elevator falls, apparent weight of the man is ;
1. 0 N
2. 90 N
3. any negative value
4. 90g N
5) A person is standing in an elevator. In which situation he finds his weight less;
1. When the elevator moves upward constant acceleration.
2. When the elevator moves upward with uniform velocity
3. When the elevator moves downward with uniform velocity
4. When the elevator moves downward with constant acceleration
6) A monkey of mass 20 kg is holding a vertical rope. The Rope will not break when a mass of 20 kg is suspended from it but will break if the mass exceeds 25 kg. What is the maximum acceleration it which the monkey can climb up along the rope ? (g equal to 10 meter per square second)
7) A body of mass M hits normally a rigid will with velocity V and bounces back with the same velocity. The impulse experienced by the body is ;
1. 2 MV
2. 1.5 MV
3. MV
4. Zero
8) A rigid ball of mass m strikes a rigid wall at 60 degrees and gets reflected without loss of speed. The value of impulse imparted by the wall on the ball will be ;
1. mV
2. mV/3
3. 2mV
4. mV/2
9) Two masses 5 kg and 10 kg are connected to a pully. What will be the acceleration if the pully is set free (g is equal to acceleration due to gravity) :
1. g/3
2. g
3. g/4
4. g/2
10) A retarding force F = – 2v is acting on a body of mass 10 grams. Find out time taken for its velocity to reduce to 37% of its initial value if initial velocity is one metar per second.
1. 5 ms
2. 7.5 ms
3. 8 ms
4. 2.5 ms
Answers to self practice test 2
1) 4
2) 3
3) 4
4) 1
5) 4
6) 3
7) 1
8) 1
9) 1
10) 1
Solutions to self practice test 2
Due to this option 4 is correct.
M
Note : You should answer the multiple choice questions in your own method. Check whether the solutions that are given are related to the textbook lesson.