alleryWork done by a force perpendicular to the displacement is:
- maximum
- negative
- zero
- equal to F·s
Show answer and solution
Correct answer: C. zero
cos 90° = 0.
NEET UG Unit 1B: Kinematics: 2D Motion & Projectiles — practice questions — page 2
Explore 51 free Unit 1B: Kinematics: 2D Motion & Projectiles questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–51 of 51.
Work done by a force perpendicular to the displacement is:Read the answer and worked solution →The work-energy theorem states that the net work done on a particle equals the:Read the answer and worked solution →The kinetic energy of a body of mass m moving with speed v is:Read the answer and worked solution →If the momentum of a body is doubled, its kinetic energy becomes:Read the answer and worked solution →For a conservative force, the work done in a closed path is:Read the answer and worked solution →For a conservative force F(x), the relation to potential energy U(x) is:Read the answer and worked solution →The potential energy stored in a spring of stiffness k stretched by x is:Read the answer and worked solution →A spring is stretched by 0.1 m; its stiffness is 200 N/m. The energy stored is:Read the answer and worked solution →In an elastic collision between two bodies:Read the answer and worked solution →In a perfectly inelastic collision, the bodies after collision:Read the answer and worked solution →The coefficient of restitution e for a perfectly elastic 1-D collision is:Read the answer and worked solution →Power is defined as the:Read the answer and worked solution →The SI unit of power is:Read the answer and worked solution →Instantaneous power of a force F acting on a particle moving with velocity v is:Read the answer and worked solution →1 kWh in joules is:Read the answer and worked solution →A pump lifts 100 kg of water through 10 m in 5 s (g = 10 m/s²). The power developed is:Read the answer and worked solution →The energy possessed by a body by virtue of its configuration is called:Read the answer and worked solution →Gravitational potential energy near Earth's surface for height h is:Read the answer and worked solution →For a freely falling body, as it descends, what remains constant (no air drag)?Read the answer and worked solution →The work done by gravity on a 2 kg body falling 5 m freely (g = 10 m/s²) is:Read the answer and worked solution →The kinetic energy of an electron of mass 9.1 × 10⁻³¹ kg moving at 1 × 10⁶ m/s is approximately:Read the answer and worked solution →
Worked practice questions
The work-energy theorem states that the net work done on a particle equals the:
- change in its kinetic energy
- change in its momentum
- change in its potential energy
- impulse imparted
Show answer and solution
Correct answer: A. change in its kinetic energy
W_net = ΔK = (1/2)m(v² − u²).
The kinetic energy of a body of mass m moving with speed v is:
- mv
- (1/2)mv²
- (1/2)mv
- mv²
Show answer and solution
Correct answer: B. (1/2)mv²
K = ½ m v².
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