JEE Main c11phy_wep_spring_power — practice questions
16 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice JEE Main c11phy_wep_spring_power in the app →Per NCERT §5.9 eqn 5.16, Hooke's law for an ideal spring states the spring force F_s is which?Per NCERT §5.9, the SI unit of the spring constant k is which?Per NCERT §5.9 (Summary 6), the elastic potential energy stored in a spring extended by x is which?Per NCERT §5.9 Fig 5.8, in a spring-mass system at maximum extension (x = ±x_max), the kinetic energy of the bPer NCERT §5.9 Fig 5.8, at the equilibrium position (x = 0) of a spring-mass system, the kinetic energy is whiPer NCERT §5.9 example (5.8), a 1000 kg car at 18.0 km/h (= 5 m/s) hits a spring with k = 5.25×10³ N/m. MaximuPer NCERT §5.10, AVERAGE power is defined as which ratio?Per NCERT §5.10, INSTANTANEOUS power is given by which expression in terms of F and v?Per NCERT §5.10, 1 horsepower (hp) is approximately equal to which value?Per NCERT §5.10, the unit kilowatt-hour (kWh) measures which physical quantity?Per NCERT Example 5.10, a 1800 kg elevator going up at 2 m/s against 4000 N friction needs minimum motor powerPer NCERT §5.10 + Summary, the dimensions of POWER are which?A porter carries a $20$ kg bag horizontally for $50$ m at constant height. The work done by him on the bag agaA cricket ball of mass $0.15$ kg moves at $20$ m/s. Its kinetic energy is:A delivery boy raises a $10$ kg sack to a $2$ m shelf in $4$ s. The power expended (using $g = 10$ m/s$^2$) isA carrom coin elastically collides head-on with another identical coin at rest. After collision: