Refer to BITSAT Physics Work Energy and Power MCQs provided below. BITSAT Full Syllabus Physics MCQs with answers available in Pdf for free download. The MCQ Questions for Full Syllabus Physics with answers have been prepared as per the latest syllabus, BITSAT books and examination pattern suggested in Full Syllabus by BITSAT, NCERT and KVS. Multiple Choice Questions for Work Energy and Power are an important part of exams for Full Syllabus Physics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for BITSAT Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Work Energy and Power
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Work Energy and Power in Full Syllabus. These MCQ questions with answers for Full Syllabus Physics will come in exams and help you to score good marks
Work Energy and Power MCQ Questions Full Syllabus Physics with Answers
Question: A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m moving in the y direction with speed v. If the collision is perfectly inelastic, the percentage loss in the energy during the collision is close to
- a) 56%
- b) 62%
- c) 44%
- d) 50%
Answer: 56%
Question: Consider elastic collision of a particle of mass m moving with a velocity u with another particle of the same mass at rest. After the collision the projectile and the struck particle move in directions making angles θ1 and θ2 respectively with the initial direction of motion. The sum of the angles θ1 + θ2, is :
- a) 45°
- b) 90°
- c) 135°
- d) 180°
Answer: 90°
Question: A neutron moving with speed v makes a head on collision with a hydrogen atom in ground state kept at rest. The minimum kinetic energy of the neutron for which inelastic collision takes place is
- a) 10.2 eV
- b) 20.4 eV
- c) 12.1 eV
- d) 16.8 eV
Answer: 20.4 eV
Question: An elastic string of unstretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching is
- a) 1/2 Ky2
- b) 1/2 Ky(2x + y)
- c) 1/2 K(x2 + y2)
- d) 1/2 k (x + y)2
Answer: 1/2 Ky(2x + y)
Question: A small block of mass m is kept on a rough inclined surface of inclination q fixed in a elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be :
- a) zero
- b) mgvt cos2θ
- c) mgvt sin2θ
- d) mgvt sin 2θ
Answer: mgvt sin2θ
Question: A 3.628 kg freight car moving along a horizontal rail road spur track at 7.2 km/hour strikes a bumper whose coil springs experiences a maximum compression of 30 cm in stopping the car. The elastic potential energy of the springs at the instant when they are compressed 15 cm is
- a) 12.1 × 104J
- b) 121 × 104J
- c) 1.21 × 104J
- d) 1.21 × 106J
Answer: 1.21 × 104J
Question: Work done by a conservative force is positive if
- a) P.E. of the body increases
- b) P.E. of the body decreases
- c) K.E. of the body increases
- d) K.E. of the body decreases
Answer: P.E. of the body decreases
Question: If the unit of force and length be each increased by four times, then the unit of energy is increased by
- a) 16 times
- b) 8 times
- c) 2 times
- d) 4 times
Answer: 16 times
Question: Which of the following must be known in order to determine the power output of an automobile?
- a) Final velocity and height
- b) Mass and amount of work performed
- c) Force exerted and distance of motion
- d) Work performed and elapsed time of work
Answer: Work performed and elapsed time of work
Question: A massless platform is kept on a light elastic spring as shown in fig. When a sand particle of mass 0.1 kg is dropped on the pan from a height of 0.24 m, the particle strikes the pan and spring is compressed by 0.01 m. From what height should the particle be dropped to cause a compression of 0.04 m.
- a) 3.96 m
- b) 0.396 m
- c) 4 m
- d) 0.4 m
Answer: 0.396 m
Question: The potential energy for a force field 
r is given by U (x,y) = cos (x + y). The force acting on a particle at position given by coordinates (0, π / 4) is –
- a)
- b)
- c)
- d)
Answer:
Question: A long string is stretched by 2 cm and the potential energy is V. If the spring is stretched by 10 cm, its potential energy will be
- a) V / 25
- b) V/5
- c) 5 V
- d) 25 V
Answer: 25 V
Question: A chain of mass M is placed on a smooth table with 1/n of its length L hanging over the edge. The work done in pulling the hanging portion of the chain back to the surface of the table is
- a) MgL/n
- b) MgL/2n
- c) MgL/n2
- d) MgL/2n2
Answer: MgL/2n2
Question: A particle of mass 10 kg moving eastwards with a speed 5 ms–1 collides with another particle of the same mass moving north-wards with the same speed 5 ms–1. The two particles coalesce on collision. The new particle of mass 20 kg will move in the north-east direction with velocity
- a) 10 ms–1
- b) 5 ms–1
- c)
- d) None of these
Answer:
Question: A ball is allowed to fall from a height of 10 m. If there is 40% loss of energy due to impact, then after one impact ball will go up to
- a) 10 m
- b) 8 m
- c) 4 m
- d) 6 m
Answer: 6 m
Question: When two bodies stick together after collision, the collision is said to be
- a) Partially elastic
- b) Elastic
- c) Inelastic
- d) Perfectly inelastic
Answer: Perfectly inelastic
Question: A sphere of mass m, moving with velocity V, enters a hanging bag of sand and stops. If the mass of the bag is M and it is raised by height h, then the velocity of the sphere was –
- a)
- b)
- c)
- d)
Answer:
Question: Which one of the following statements does not hold good when two balls of masses m1 and m2 undergo elastic collision
- a) When m1 < m2 and m2 at rest, there will be maximum transfer of momentum.
- b) When m1 > m2 and m2 at rest, after collision the ball of mass m2 moves with four times the velocity of m1.
- c) When m1 = m2 and m2 at rest, there will be maximum transfer of K. E.
- d) When collision is oblique and m2 at rest with m1 = m2 after collision the ball moves in opposite directions.
Answer: When collision is oblique and m2 at rest with m1 = m2 after collision the ball moves in opposite directions.
Question: In the figure shown the potential energy U of a particle is plotted against its position ‘x’ from origin. Then which of the following statement is correct. A particle at –
- a) x1 is in stable equilibrium
- b) x2 is in stable equilibrium
- c) x3 is in stable equilibrium
- d) None of these
Answer: None of these
Question: A mass m1 moves with a great velocity. It strikes another mass m2 at rest in a head on collision. It comes back along its path with low speed, after collision. Then
- a) m1 > m2
- b) m1 < m2
- c) m1 = m2
- d) m1 ³ m2
Answer: m1 < m2
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BITSAT Full Syllabus Physics Work Energy and Power MCQs
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MCQs for Physics BITSAT Full Syllabus Work Energy and Power
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Work Energy and Power MCQs Physics BITSAT Full Syllabus
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Work Energy and Power BITSAT Full Syllabus MCQs Physics
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BITSAT MCQs Physics Full Syllabus Work Energy and Power
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